B: Glossary Terms

B

blue chipStocks

A large, long-established company with a record of consistent earnings, a strong balance sheet and often an uninterrupted dividend history. The label is descriptive rather than defined by any regulator or index provider, and it confers no protection: businesses once carrying the description have cut dividends, lost market position or failed outright.

bull marketStocks

An extended period of rising prices in a market or asset, generally associated with investor optimism.

bear marketStocks

An extended period of falling prices in a market or asset, commonly defined as a decline of 20% or more from a recent high.

bid priceStocks

The highest amount a buyer is currently willing to pay for a security, shown on the buy side of the quote. A market sell order executes against it, so it is what a seller receives before fees. The gap between it and the ask is the spread, and the size displayed shows how many shares can be sold at that level.

bid-ask spreadStocks

The difference between the highest price a buyer is willing to pay (bid) and the lowest price a seller is willing to accept (ask); a narrower spread generally signals a more liquid market. Full guide →

bracket orderStocksCrypto

A set of linked orders surrounding a position, commonly pairing a protective stop with a profit-taking limit so execution of one exit cancels the other.

broker-dealerStocks

A broker-dealer is a person or firm in the business of effecting securities transactions for customers as a broker, for its own account as a dealer, or both, subject to securities regulation.

buying powerStocksCrypto

The amount of additional securities exposure an account can establish under cash, margin, collateral, and broker risk rules.

borrow availabilityStocks

The quantity of a security that securities-lending desks can currently locate for short sellers. It depends on how much stock sits in lendable accounts, mainly margin accounts and institutional lending programs. When availability falls the fee rises, existing loans can be recalled, and brokers may decline new short orders in that name entirely.

borrow feeStocks

The cost a broker charges to lend out shares for a short sale, which rises when a stock is hard to borrow. Full guide →

balance sheetStocks

A snapshot of a company's assets, liabilities, and shareholders' equity at a specific date.

basic EPSStocks

Net income available to common shareholders divided by weighted-average common shares actually outstanding during the period.

book valueStocks

Accounting equity equal to total assets minus total liabilities, subject to the measurement rules used in the financial statements.

blank-check companyStocks

A shell corporation formed with no operating business, which raises money from investors in order to acquire an unspecified target later. The special purpose acquisition company is the best-known form: proceeds are held in trust, sponsors face a deadline to complete a combination, and holders can redeem their shares for the trust amount instead of participating.

bar chartStocksCrypto

A price chart drawing each period as a vertical line spanning the high and the low, with a short tick on the left marking the open and one on the right marking the close. It carries the same four values as a candlestick without the colored body, and the length of each line conveys how wide that period's range was.

Bollinger BandsStocksCrypto

A volatility indicator consisting of a moving average with upper and lower bands set a number of standard deviations away, which widen and narrow as volatility changes. Full guide →

Bollinger bandwidth(Bandwidth) StocksCrypto

A normalized measure of the distance between Bollinger Bands, commonly used to identify volatility contraction and expansion.

breadth thrustStocksCrypto

A signal in which the proportion of advancing issues surges from a depressed level to an extreme over a short window, indicating a rapid and broad shift in participation. The best-known version measures a ten-day average of advancers as a share of total issues moving from roughly forty percent to above sixty. Occurrences are rare, so the historical sample is small. Full guide →

bull flagStocksCrypto

A short continuation formation in which a sharp advance is followed by a shallow, orderly pullback drifting slightly lower within parallel boundaries on declining volume. A move above the upper boundary resumes the trend, and the conventional target adds the length of the preceding advance to the breakout level. Deep or prolonged retracements invalidate the setup.

bear flagStocksCrypto

A short continuation formation in which a sharp decline is followed by a shallow upward drift within parallel boundaries on lighter volume, representing a pause rather than a change in direction. A close beneath the lower boundary resumes the decline, and the conventional projection subtracts the length of the prior drop from the breakdown point.

bull pennantStocksCrypto

A short continuation formation following a steep advance, where the pause converges into a small symmetrical triangle rather than a parallel channel. Volume dries up during the consolidation and expands on the break above the upper boundary. As with a flag, the conventional target adds the height of the preceding move to the breakout level.

bear pennantStocksCrypto

A short continuation formation after a steep decline, where price consolidates into a small converging triangle before resuming lower. Volume contracts during the pause and expands on the break beneath the lower boundary. The conventional projection subtracts the length of the drop that preceded the consolidation from the breakdown point.

bullish engulfingStocksCrypto

A two-candle formation in which a down period is followed by an up period whose body completely covers the prior body, opening at or beneath the previous close and closing at or above the previous open. Appearing after a decline, it shows demand overwhelming the prior session's supply, and heavier relative volume strengthens the reading. Full guide →

bearish engulfingStocksCrypto

A two-candle formation in which an up period is followed by a down period whose body entirely covers the prior body, opening at or above the previous close and closing at or beneath the previous open. Occurring after an advance it indicates supply overwhelming demand. Context matters: the same shape inside a range carries little information. Full guide →

bullish haramiStocksCrypto

A two-candle formation in which a long down period is followed by a small-bodied period contained entirely within the previous body. The contraction in range signals selling pressure fading rather than demand asserting itself, so it is a warning of a possible pause or turn that requires confirmation from a subsequent higher close. Full guide →

bearish haramiStocksCrypto

A two-candle formation in which a long up period is followed by a small-bodied period whose range sits inside the previous body. The sudden contraction after a strong advance indicates buying momentum stalling. It is a milder signal than an engulfing formation because control has not actually changed hands, only slowed, so confirmation is needed. Full guide →

breakout tradingStocksCrypto

Entering when price moves beyond a defined boundary such as a range high, a trendline, or a prior swing level, on the view that the move marks a shift in supply and demand. Traders typically require confirmation such as rising volume or a close beyond the level, and place a stop back inside the range. The main failure mode is a false move that immediately reverses.

buy and holdStocksCrypto

An investment approach in which an investor purchases securities and holds them for years or decades through market ups and downs rather than trying to time entry and exit points. Investor.gov describes buy-and-hold as a form of passive investing that seeks to capture the market's long-term tendency to rise rather than reacting to short-term price swings. Full guide →

break-even win rateStocksCrypto

The win rate required for zero expected value given the average win, average loss, and trading costs under a simplified outcome model.

black swanStocksCrypto

An outcome that prevailing models did not anticipate, that carries severe consequences, and that gets rationalized as predictable only after it happens. The label comes from Nassim Nicholas Taleb's work on uncertainty. The practical implication for portfolios is that historical distributions understate tail severity, so sizing and hedging built on normal-distribution assumptions can fail precisely when they are needed.

bull call spreadStocksOptions

A bullish defined-risk vertical created by buying a lower-strike call and selling a higher-strike call with the same expiration.

bear put spreadStocksOptions

A bearish defined-risk vertical created by buying a higher-strike put and selling a lower-strike put with the same expiration.

bull put spreadStocksOptions

A bullish or neutral defined-risk credit vertical created by selling a higher-strike put and buying a lower-strike put with the same expiration.

bear call spreadStocksOptions

A bearish or neutral defined-risk credit vertical created by selling a lower-strike call and buying a higher-strike call with the same expiration.

block tradeStocksOptionsCryptoFutures

A transaction involving a relatively large quantity or value of securities, often negotiated or executed using institutional trading methods.

business cycleStocksCrypto

The recurring pattern of expansion, peak, contraction, and trough in aggregate economic activity, measured across output, employment, income, and sales rather than by any single indicator. In the United States the National Bureau of Economic Research dates the turning points, usually well after they occur. Cycle position matters to markets because industries and asset classes lead and lag at different phases.

building permitsStocks

Authorizations issued by local governments to begin residential construction, counted monthly. Because a permit precedes ground-breaking, the series leads housing starts and gives an early read on construction activity in coming months. Not every authorization results in a start, and requirements vary by jurisdiction, so the level is a pipeline indicator rather than a firm count of future building.

budget deficitStocksCrypto

The shortfall in a single period when a government's outlays exceed the revenue it collects, covered by issuing debt. It is usually quoted in currency terms and as a share of economic output, which makes comparison across countries and periods meaningful. It is a flow measured over a year, while the accumulated stock of past shortfalls forms the national debt.

block heightCrypto

The sequential position of a block in a blockchain, commonly counted from the genesis block.

block rewardCrypto

Compensation paid to a block producer, potentially including newly issued tokens, transaction fees, and protocol-specific rewards.

Byzantine fault toleranceCrypto

A property of a distributed system that lets it agree on a single valid state even when some participants crash, behave arbitrarily, or deliberately lie. Classical algorithms of this kind tolerate faulty participants up to a fraction of the total, commonly under one third, and finalize a decision once a supermajority attests to it. Many proof-of-stake blockchains use variants of these algorithms to finalize blocks.

Byzantine Generals ProblemCrypto

A thought experiment describing commanders who must agree on a coordinated plan while communicating only by messenger, with some of them possibly treacherous and messages possibly lost. It formalizes the question of whether honest participants can reach agreement despite arbitrary misbehavior. It is the theoretical framing that blockchain consensus designs answer, substituting economic cost and cryptographic proof for assumed honesty.

blockchain reorganizationCrypto

An event in which nodes abandon a chain of recently confirmed blocks in favor of a competing chain that the consensus rules judge canonical, so transactions in the discarded blocks return to a pending state or disappear. Shallow cases of a block or two happen naturally in proof-of-work networks when two miners publish at nearly the same time. Deep ones can enable double spending, which is why exchanges wait for multiple confirmations.

base fee(EIP-1559 base fee) Crypto

The protocol-calculated minimum transaction fee component in Ethereum's EIP-1559 fee market that is burned rather than paid to the validator.

base assetCrypto

The first asset named in a trading pair, the one whose quantity is being bought or sold. In BTC/USDT it is bitcoin, so the displayed price states how many units of the second currency one unit of the first costs. Order sizes are normally expressed in units of this asset, and profit or loss can be measured either in it or in the pricing currency.

Bitcoin dominance(BTC dominance) Crypto

Bitcoin's market capitalization as a percentage of the total crypto market capitalization under a data provider's methodology.

borrow APYCrypto

The annualized cost a borrower is estimated to pay for a DeFi loan, including stated compounding and potentially offsetting incentives depending on methodology.

bridge riskCrypto

Exposure to failure of the system that moves value between blockchains, which typically locks assets on one chain and issues representations on another. Loss can come from a compromised validator set or multisig, a flawed message verification contract, or a mint that is not properly backed. Bridges have been among the largest sources of loss in crypto because they concentrate custody at a single contract.

block explorerCrypto

A web service that indexes a blockchain and presents it in searchable form, letting anyone look up a transaction hash, address, block, or contract and see status, balances, fees, and token transfers. Many also verify and display contract source code alongside the deployed bytecode. It reads from full or archival nodes, so it is a convenient view of the chain rather than an authority over it.

browser walletCrypto

A wallet that runs as a browser extension or in-page component, storing encrypted keys locally and providing an interface that lets websites request signatures and transactions. It is the standard way to interact with decentralized applications. Because it operates inside the browser and signs what a site requests, malicious pages, look-alike domains, and deceptive approval prompts are the main threats to it.

blind signingCrypto

Approving a cryptographic transaction or message without the signing device presenting human-readable details sufficient to understand what is being authorized.

blacklist functionCrypto

Smart-contract logic allowing an authorized role to restrict specified addresses from transfers or protocol functions.

bug bountyCrypto

A program that rewards security researchers for responsibly disclosing qualifying vulnerabilities according to defined rules.

bridge exploitCrypto

A security breach that compromises bridge contracts, validator keys, message verification, liquidity, or custody and allows unauthorized value transfer.

basis transferCrypto

Carrying an asset's original cost basis and holding period with it when it moves between accounts or wallets owned by the same person, rather than resetting them. The move itself is not a disposition and produces no gain or loss, but the receiving platform usually has no visibility into the original purchase, so it may report a blank or zero basis unless the owner supplies acquisition records. Gifts and inherited property follow separate basis rules that do not simply carry over.

behavioral financeStocksCrypto

Field that studies how real decision-making departs from the rational-agent assumptions of classical finance, drawing on psychology to explain persistent patterns in prices and in investor behavior. It documents systematic errors such as loss aversion, overconfidence, and mental accounting, and links them to observed phenomena including momentum, bubbles, and the tendency of individual investors to sell winners while holding losers. Its practical use is in designing rules and processes that constrain predictable errors.

break-even effectStocksCrypto

Tendency to increase risk after losses in an attempt to return to the starting point, rather than sizing to current conditions. It pairs with the house-money effect in prospect theory, where people become risk-seeking in the loss domain because an additional loss adds less felt pain than the relief of getting back to even. In trading it produces revenge trades, oversized positions, and abandoned stop levels while account equity is already impaired.

benchmarkStocksCrypto

A defined reference portfolio, index, rate, or strategy used to evaluate relative performance and risk.

bidStocksCrypto

The highest displayed price a buyer is currently willing to pay for a stated quantity of a security.

brokerStocks

Firm or person that executes securities transactions on behalf of clients, compensated through commission, spread, payment for order flow, or account fees. In the United States a broker-dealer registers with the SEC, joins a self-regulatory organization such as FINRA, must handle customer orders under best execution obligations, and holds client assets subject to customer protection rules. Acting as broker means executing for a customer; acting as dealer means trading for the firm's own account.

borrowStocks

Locating and taking delivery of shares from a lender so they can be sold short, in exchange for collateral and a fee. The lender, usually a custodian, fund, or margin client whose shares are lendable, keeps economic ownership and receives substitute payments in place of dividends, while the borrower must return equivalent shares on demand. Availability and the fee charged depend on how much of the lendable supply is already on loan, and a recall can force the short position to close.

buy-inStocksCrypto

A forced purchase of securities to close a failed delivery or unavailable short position under broker, clearing, or market rules.

backlogStocks

Contracted or committed customer demand that has not yet been recognized as revenue, subject to cancellation and timing risks. Full guide →

bookingsStocks

The value of customer contracts or orders signed during a period; definitions vary substantially among companies and are often non-GAAP operating metrics. Full guide →

billingsStocks

An operating metric often approximating revenue plus the change in deferred revenue, used in subscription businesses; company definitions can vary. Full guide →

betaStocksCrypto

A measure of how an asset's returns tend to move relative to a benchmark, commonly estimated as covariance with the benchmark divided by benchmark variance.

bookbuilding(Book Building) Stocks

Book building is the process by which underwriters set the price and allocation of a new securities issue by collecting indications of interest from institutional investors. The syndicate markets a price range, investors submit orders stating quantity and the price they will pay, and the bookrunner assembles that demand curve to choose a clearing price and decide who receives shares. Discretionary allocation lets the issuer favour investors expected to hold, which distinguishes the method from a fixed price offer or an auction.

breakoutStocksCrypto

A move beyond a defined resistance, support, range, pattern boundary, or volatility threshold that traders interpret as potential continuation or regime change. Full guide →

breakdownStocksCrypto

A downside move below support, a range floor, or another defined price boundary. Full guide →

baseStocksCrypto

A sustained consolidation area from which traders may look for a later breakout, particularly after a prior decline or long pause.

breakevenStocks

Price at which a position produces neither profit nor loss once all costs are counted. For a long call it is the strike plus the premium paid, for a long put the strike minus the premium, and for a stock position the purchase price plus commissions and any financing cost. In corporate analysis, breakeven volume is fixed costs divided by contribution margin per unit. In every case it is a reference point rather than a target or a forecast.

BitcoinCrypto

The first and largest cryptocurrency, using Proof of Work consensus and a fixed maximum supply of 21 million coins. Full guide →

BTCCrypto

Ticker symbol and unit name for bitcoin, the asset native to the Bitcoin blockchain. New units are issued to miners as a block subsidy that halves at a fixed interval measured in blocks, capping total issuance at twenty-one million units, each divisible into one hundred million satoshis. Balances are controlled by private keys and moved by transactions confirmed through proof-of-work mining. It is a bearer asset: a lost key means the balance cannot be recovered by anyone.

blockchainCrypto

A distributed, cryptographically linked record of transactions maintained across many computers according to a network's consensus rules, rather than a single central database. Full guide →

blockStocksCrypto

A batch of transactions and metadata accepted into a blockchain's ordered history according to the network's consensus rules.

BFTStocks

Byzantine fault tolerance, the property of a distributed system that continues to reach correct agreement even when some participants fail arbitrarily, including by deliberately sending conflicting messages. Classical protocols achieve it when fewer than one third of participants are faulty, using rounds of voting so honest nodes commit only what a supermajority has attested. Many proof-of-stake designs draw on these results to provide explicit finality guarantees rather than purely probabilistic settlement.

bridge(bridges) Crypto

Systems that move value between blockchains that cannot verify each other's state. Most either lock an asset on the source chain and mint a representation on the destination, or burn one representation and mint another. Because locked collateral sits in a single contract secured by a validator set or a multisignature wallet, bridges concentrate large balances behind one trust assumption, which has made them among the largest single points of loss in crypto. Full guide →

builderStocks

Specialist that assembles the contents of a block and bids for the right to have a proposer include it, under proposer-builder separation. Builders compete on the total value of the bundle, which includes transaction fees and value extractable from ordering, and the proposer accepts the highest bid without seeing the contents, using a commitment scheme. The design concentrates the complex work of ordering transactions among a few sophisticated parties while keeping block proposal itself accessible.

basisStocksFutures

The difference between the spot (cash) price of an asset and the price of a related futures contract, calculated as spot price minus futures price; a widening or narrowing basis reflects changing carrying costs, supply and demand, or time to expiration.

burnStocksCrypto

Permanently removing token units from circulating supply, usually by calling a contract function that destroys them or by sending them to an address with no recoverable private key. The action is verifiable on-chain and irreversible. Protocols burn to offset emissions, to convert fee revenue into supply reduction, or as the second half of a buyback. Burning reduces supply without creating demand, so it does not mechanically raise price.

bribeStocks

A payment offered to holders of governance voting power in exchange for directing their votes, most visibly in vote-escrow systems where votes decide which liquidity pools receive token emissions. The payment usually routes through a public marketplace contract rather than being made privately, and participants describe it as an incentive. Economically it is a bid for emissions: a protocol pays voters less than the emissions it expects to attract.

BacktestStocksCrypto

A simulation of a trading strategy's rules against historical price data to estimate how it would have performed. Full guide →

Blockchain ExplorerCrypto

A website or tool that lets anyone look up transactions, addresses, and blocks recorded on a public blockchain.

Blue Chip StockStocks

Stock of a large, well-established, financially stable company, typically with a long operating history and a reputation for reliability.

Buyback (Share Repurchase)Stocks

A company's purchase of its own outstanding shares on the open market, which reduces share count and can increase per-share metrics like EPS.

Beacon BlockCrypto

A consensus-layer block containing validator-related data and an execution payload after Ethereum's Merge.

Beacon ChainCrypto

Ethereum's proof-of-stake consensus chain introduced before the Merge and now integrated as the consensus layer of Ethereum.

BIP-32(BIP32) Crypto

A Bitcoin Improvement Proposal defining hierarchical deterministic key derivation from a master seed.

BIP-39(BIP39) Crypto

A widely used Bitcoin Improvement Proposal defining mnemonic seed phrases and how they encode entropy for deterministic wallets.

BIP-44(BIP44) Crypto

A multi-account hierarchical deterministic wallet convention defining standardized derivation-path structure across coins and account types.

Bitcoin Halving(halving) Crypto

A programmed Bitcoin event that cuts the block subsidy roughly in half after a fixed number of blocks, reducing the rate of new BTC issuance.

Block ConfirmationCrypto

A count or state describing how many blocks have been added after the block containing a transaction, used on some chains as a settlement-confidence proxy.

Block ProposalCrypto

The act of selecting and publishing a candidate block by the validator, miner, or sequencer assigned or permitted to produce it.

Block SpaceCrypto

The limited capacity within blockchain blocks available for transactions and data, making inclusion a scarce resource during congestion.

Block SubsidyCrypto

The newly created coins paid by a protocol to a proof-of-work miner or other block producer, distinct from transaction fees.

Block TimeCrypto

The average or target time between newly produced blocks on a blockchain, which can vary substantially around the average.

BundlerCrypto

An ERC-4337 participant that packages user operations into transactions and submits them to the EntryPoint contract.

BytecodeCrypto

Low-level code executed by a virtual machine such as the EVM after a smart contract is compiled from a higher-level language.

Byzantine FaultCrypto

Arbitrary or malicious behavior by a distributed-system participant, including sending conflicting information to different peers.

Byzantine Fault Tolerance (BFT)(BFT) Crypto

The ability of a distributed system to reach agreement despite some participants failing or acting maliciously within specified assumptions.

Basket TokenCrypto

A token representing a managed or algorithmic portfolio of multiple assets held or referenced by a protocol.

BlacklistingCrypto

A token-control feature that can block specified addresses from transferring or receiving an asset, typically under issuer or contract authority.

Bridged TokenCrypto

A token representation created after an asset is locked, burned, or otherwise accounted for on another chain and transferred through a bridge.

Burn AddressCrypto

An address designed or widely treated as having no usable private key, so assets sent to it are effectively removed from circulation.

Burnable TokenCrypto

A token that supports permanently removing units from circulating ownership through a burn function or provably inaccessible address.

Buyback and Burn(buyback-and-burn) Crypto

A mechanism where tokens are repurchased and permanently removed from supply.

BackwardationCryptoFutures

A futures-curve condition where later-dated contracts trade below nearer-dated contracts or spot under the chosen comparison. Full guide →

Bankruptcy PriceCrypto

The theoretical price at which a leveraged position's remaining margin is exhausted before fees or liquidation protections, depending on venue methodology.

Basis TradeCrypto

A relative-value trade targeting the difference between spot and derivative prices rather than an outright directional view.

Block RFQCrypto

A request-for-quote workflow designed for large or multi-leg crypto derivatives trades that may be reported to a venue after negotiation.

Butterfly (Volatility)Crypto

An options-volatility metric comparing wing implied volatilities with at-the-money volatility to assess curvature or smile richness.

BagholderCrypto

A trader left holding an asset after a severe decline, often after other participants have sold.

Bitcoin BetaCrypto

A cryptoasset's historical return sensitivity to Bitcoin returns based on a specified regression window.

Bitcoin Layer 2Crypto

A broad and sometimes inconsistently used label for payment channels, sidechains, rollups, or other systems that extend Bitcoin's functionality or throughput with varying security assumptions.

BRC-20(BRC20) Crypto

An experimental fungible-token convention on Bitcoin using Ordinal inscriptions and off-chain indexing rather than a native smart-contract token standard.

Buy TaxCrypto

A token contract fee charged on purchases, reducing the amount the buyer receives.

BackstopCrypto

A reserve, insurance module, auction, capital provider, or governance mechanism designed to absorb losses that ordinary collateral or liquidations cannot cover.

Bad DebtCrypto

Debt that remains after collateral is insufficient or unavailable to cover a borrower's obligation.

Bonding CurveCrypto

A formula that sets token price as a function of supply or reserves, enabling algorithmic issuance, redemption, or market making.

Borrow CapCrypto

The maximum aggregate amount of an asset that a protocol allows users to borrow from a market.

Borrow PositionCrypto

An outstanding DeFi loan consisting of borrowed principal, accrued interest, collateral dependencies, and liquidation risk.

Borrowing PowerCrypto

The maximum debt value a protocol permits based on deposited collateral, collateral factors, asset prices, and risk settings.

Bribe MarketCrypto

A marketplace where protocols or participants offer incentives to governance voters in exchange for directing emissions or votes toward specified targets.

Backlog ConversionStocks

The rate at which reported backlog turns into recognized revenue, which depends on cancellations, timing, fulfillment, and contract terms.

Beat and RaiseStocks

Trader shorthand for reporting results above expectations while also increasing forward guidance.

Book-to-Bill RatioStocks

Orders received during a period divided by revenue or shipments recognized during that period, commonly used in industries with visible backlog.

Break-Even PointStocks

The sales or volume level at which total revenue equals total costs under the assumptions used.

Backrunning(back running) Crypto

Submitting a transaction to be sequenced immediately after a known pending one in order to profit from the price effect that pending transaction causes, for example buying just after a large swap moves a pool, or capturing an arbitrage the swap creates. It does not worsen the original trader's execution the way front running does, but it captures value their activity generated. It is a common form of maximal extractable value.

Based PreconfirmationCrypto

A preconfirmation provided through base-layer proposers or aligned infrastructure for transactions on a based rollup or similar system.

Based Rollup(base-layer sequenced rollup) Crypto

A rollup whose transaction sequencing is delegated substantially to the base layer's block proposers or sequencing process.

BatchCrypto

A group of rollup transactions compressed, committed, proven, or submitted together to reduce per-transaction overhead.

Batch SubmissionCrypto

Publishing a rollup's transaction data, state commitments, or proof-related information to its settlement or data-availability layer.

BlobCrypto

A large data object attached to a blockchain transaction for temporary data availability, notably used by Ethereum rollups after proto-danksharding.

Blob FeeCrypto

The fee paid for consuming blob data-availability capacity under Ethereum's separate blob fee market.

BlobspaceCrypto

The block capacity allocated to blob data, creating a distinct fee market for rollup data publication.

Block BuilderCrypto

An entity that constructs candidate block payloads by selecting and ordering transactions, often competing to pay a proposer for block inclusion.

Block ProposerCrypto

A validator or miner selected to publish a block and choose among available block payloads or transactions under protocol rules.

Block ValueCrypto

The economic value of a candidate block to a proposer, including transaction priority fees and builder payments under the relevant architecture.

Bridge DelayCrypto

The time between initiating a cross-chain transfer and receiving usable assets on the destination, including finality, challenge, and liquidity constraints.

Bridge FeeCrypto

The amount charged for a cross-chain transfer, potentially including protocol, relayer, gas, and liquidity-provider components.

Bridge FinalityCrypto

The point at which a cross-chain transfer is considered sufficiently irreversible under both source-chain and bridge security assumptions.

Bridge LiquidityCrypto

Assets available to fulfill cross-chain transfers, particularly in bridges using liquidity pools or market makers.

Bridge MultisigCrypto

A bridge controlled partly or entirely by a multisignature wallet, creating security dependence on signer keys and threshold rules.

Bridge Validator SetCrypto

The signers or validators authorized to attest cross-chain messages for a bridge that relies on an external validator security model.

Builder BidCrypto

The payment a block builder offers a proposer for choosing its block payload.

Builder MarketCrypto

The competitive market among block builders for transaction order flow and the right to supply valuable block payloads.

BundleCrypto

An ordered group of transactions submitted for joint or preferential inclusion in a block, often used for MEV strategies.

Burn-and-Mint BridgeCrypto

A bridge model that burns a token representation on the source chain and mints an equivalent representation on the destination chain.

Best Ask(best offer) StocksCrypto

The lowest currently available quoted ask among the venues or sources included in the market-data view.

Best BidStocksCrypto

The highest currently available quoted bid among the venues or sources included in the market-data view.

Best ExecutionStocksCrypto

A broker's duty to use reasonable diligence to seek the most favorable terms reasonably available for customer transactions under applicable rules.

Block DeskStocksCrypto

A brokerage or dealer trading desk specializing in sourcing liquidity and executing large institutional transactions.

BackspreadStocksOptions

A ratio strategy holding more long options than short options, typically seeking a large directional or volatility move while accepting a loss zone.

Bermudan OptionStocksOptions

An option exercisable only on specified dates before expiration, combining features of American- and European-style exercise.

Big LizardStocksOptions

An options structure combining a short straddle with protective wings on one or both sides, with definitions varying across trading platforms.

Binary EventStocksOptions

An event with sharply different possible outcomes that can create discontinuous price moves and unusually high option-implied volatility.

Binomial Option Model(binomial tree) StocksOptions

A discrete-time option-pricing framework that models possible underlying price paths through a recombining tree and can accommodate early exercise.

Black-Scholes Model(Black-Scholes-Merton, BSM) StocksOptions

A foundational option-pricing model for European-style options under assumptions including lognormal prices, constant volatility, and frictionless hedging.

Box SpreadStocksOptions

A four-leg options combination of a bull call spread and bear put spread with identical strikes and expiration that creates a fixed expiration payoff under ideal conditions.

Break-Even Price(breakeven) StocksOptions

The underlying price at expiration at which an options position has zero profit or loss after accounting for premium under a simplified payoff model.

Broken-Wing ButterflyStocksOptions

An asymmetric butterfly with unequal wing widths, altering credit, directional bias, and tail risk relative to a standard butterfly.

Butterfly SpreadStocksOptions

A three-strike defined-risk options structure that concentrates maximum payoff near a middle strike at expiration.

Buy to Close(BTC) StocksOptions

An options order that purchases an option to reduce or eliminate a previously established short option position.

Buy to Open(BTO) StocksOptions

An options order that purchases a contract to establish or increase a long option position.

Buy-WriteStocksOptions

A transaction that simultaneously buys shares and sells a call against them, establishing a covered-call position in one order.

Backtest BiasStocksCrypto

Any systematic distortion that makes historical strategy results appear better or worse than what could realistically have been achieved.

Backtest EngineStocksCrypto

Software that simulates strategy rules against historical data with defined assumptions for timing, fills, costs, positions, and corporate actions.

Bagging(bootstrap aggregating) StocksCrypto

An ensemble technique training models on resampled datasets and averaging their outputs to reduce variance.

Bar-Based BacktestStocksCrypto

A simulation using open-high-low-close-volume bars rather than individual trades or order-book events.

Basis RiskStocksCrypto

The risk that a hedge and the exposure being hedged do not move together as expected, leaving residual gains or losses.

Bayesian OptimizationStocksCrypto

A sequential method using a probabilistic model of prior evaluations to choose promising parameter combinations more efficiently.

Benchmark Relative ReturnStocksCrypto

Portfolio return minus benchmark return over the same period and methodology.

Block BootstrapStocksCrypto

A bootstrap method resampling contiguous blocks rather than individual observations to preserve some time-series dependence.

BoostingStocksCrypto

An ensemble method that sequentially trains weak learners to correct prior errors and combine them into a stronger predictor.

BootstrapStocksCrypto

A resampling method that repeatedly draws observations or blocks from observed data to estimate uncertainty or sampling distributions.

Borrow CostStocksCrypto

The financing cost of borrowing a security for a short position, usually quoted as an annualized rate but accrued according to broker terms.

Borrow RecallStocksCrypto

A lender's request to return borrowed shares, which can force a short seller or intermediary to source replacement borrow or close the position.

Breakeven Transaction CostStocksCrypto

The maximum average trading cost a strategy could absorb before its estimated expected return falls to zero.

Brier ScoreStocksCrypto

The mean squared error of probabilistic forecasts for binary outcomes, rewarding well-calibrated and accurate probabilities.

Basic Shares OutstandingStocks

The weighted-average common shares actually outstanding during a reporting period, used to calculate basic earnings per share.

Beneficial OwnershipStocks

Ownership in which a person enjoys the economic benefits of a security even when legal title is registered in another name or entity.

Board LotStocks

A standardized trading quantity set by an exchange, commonly used in markets outside the United States.

Book Value Per Share(BVPS) Stocks

Common shareholders' book equity divided by common shares outstanding, used as a balance-sheet value reference.

BookrunnerStocks

An underwriter responsible for maintaining the order book and coordinating investor demand and allocations in an offering.

Bid VolumeStocksCrypto

Executed volume classified as occurring at or against the bid, typically interpreted as aggressive selling under common order-flow conventions.

Block PrintStocksCrypto

A reported transaction large enough to be considered a block relative to the security or venue.

Bollinger %B(%B) StocksCrypto

An indicator locating price relative to the lower and upper Bollinger Bands, with values near zero and one corresponding roughly to the bands.

Bollinger SqueezeStocksCrypto

Trader shorthand for unusually narrow Bollinger Bands, indicating reduced recent volatility that may precede expansion without predicting direction.

Break of Structure (BOS)(BOS) StocksCrypto

Trader terminology for price decisively moving beyond a prior structural swing point in the direction of the prevailing trend; definitions vary by methodology.

Breaker BlockStocksCrypto

ICT-style trader jargon for a previously identified order block that fails and is then interpreted as potential support or resistance from the opposite side.

Bond(fixed-income security, debt security, bonds) Stocks

A bond is a debt security in which an investor lends money to a government, municipality, or corporation in exchange for periodic interest payments and return of the principal (face value) at a stated maturity date. Bonds are typically issued with a fixed coupon rate and trade in secondary markets at prices that move inversely to prevailing interest rates. Unlike stocks, bondholders are creditors rather than owners and generally have a priority claim on the issuer's assets if it defaults.

Bond LadderStocks

A bond ladder is a portfolio strategy in which an investor buys multiple bonds with staggered maturity dates, so that a portion of the portfolio matures and can be reinvested at regular intervals. This structure reduces reinvestment-rate and interest-rate risk compared with holding a single large bond position, since only a fraction of the ladder matures (and needs reinvesting) at any given point in the rate cycle. As each rung matures, the proceeds are typically reinvested in a new bond at the far end of the ladder to maintain the staggered structure. Full guide →

Back Month(Far-Term Expiration) Options

A later expiration cycle beyond the nearest one for an underlying's options; in a calendar or diagonal spread, the back-month option is typically the one bought, since it decays more slowly and retains more time value.

beige bookStocksCryptoOptionsFutures

The Federal Reserve's "Summary of Commentary on Current Economic Conditions," published eight times a year ahead of each FOMC meeting, compiling qualitative, anecdotal reports on regional economic conditions gathered by each of the 12 regional Reserve Banks from local business contacts. Full guide →

breakeven inflation rateStocksCryptoOptionsFutures

The market-implied average annual inflation rate over a bond's life, calculated as the yield on a nominal Treasury minus the yield on a Treasury Inflation-Protected Security (TIPS) of the same maturity; it is the inflation rate at which an investor would be indifferent between holding the nominal bond and the TIPS. Full guide →

Batting AverageStocksCrypto

A performance statistic measuring the percentage of periods, such as months or quarters, in which a portfolio or strategy outperformed its benchmark, regardless of the size of the outperformance or underperformance. Full guide →

Bona Fide Hedge(bona fide hedge exemption) FuturesOptions

A futures or options position that offsets price risk arising from an underlying commercial or physical business activity and meets CFTC Regulation 150.1’s economically appropriate test, qualifying the holder for an exemption from standard speculative position limits.

Back-Month Contract(deferred contract) Futures

A futures contract with an expiration further out than the near-month (front-month) contract, used for longer-horizon hedging, spread trading, or positioning ahead of an anticipated roll.

Book-Entry SettlementStocks

Ownership transfer recorded as electronic entries in a custodian's or depository's ledger rather than through physical certificates, the method used for essentially all U.S. equity settlement today. Full guide →

Best Bid and Offer(BBO) Stocks

The highest bid price and lowest ask price currently quoted at a single trading venue, as distinct from the National Best Bid and Offer (NBBO), which is the best bid and offer across all venues combined. Full guide →

Back-End Load(deferred sales charge, contingent deferred sales charge, CDSC) Stocks

A sales charge applied when mutual fund shares are sold rather than purchased, typically declining the longer the shares are held until it phases out entirely.

Breakpoint(load breakpoint) Stocks

An investment threshold at which a mutual fund's front-end sales load is reduced, giving investors who commit larger dollar amounts a lower commission rate.

Bond ETF(fixed income ETF) Stocks

An ETF that holds a portfolio of bonds, such as government, corporate, or municipal debt, trading intraday on an exchange even though the underlying bonds themselves trade over the counter and less frequently. Full guide →

Backdoor Roth IRAStocks

A two-step strategy used by higher earners whose income exceeds the Roth IRA eligibility limit: first contributing to a nondeductible Traditional IRA, then converting those funds to a Roth IRA. It relies on the fact that Roth conversions themselves have no income limit, though the pro-rata rule can create an unexpected tax bill if the individual holds other pre-tax IRA balances. Full guide →

Broadening Formation(Megaphone Pattern) StocksCrypto

A chart pattern marked by two diverging trendlines as swing highs get progressively higher and swing lows get progressively lower, reflecting increasing volatility and disagreement between buyers and sellers. Full guide →

Breakaway GapStocksCrypto

A price gap that occurs as a stock or asset breaks decisively out of a consolidation range or chart pattern, typically on heavy volume, marking the start of a new trend rather than a continuation or exhaustion move.

Breadth DivergenceStocks

A warning signal that occurs when a market index makes a new high or low while breadth measures (like the advance-decline line or percent of stocks above their moving average) fail to confirm, indicating the move is being driven by fewer stocks than the headline index suggests. Full guide →

Bullish Percent Index(BPI) Stocks

A market breadth indicator that measures the percentage of stocks within an index currently showing a point-and-figure buy signal, used to gauge overbought or oversold conditions across the broad market.

Backup WithholdingStocksCrypto

A flat-rate federal tax withholding a payer must apply to certain reportable payments (such as interest, dividends, or broker proceeds) when the recipient has not furnished a correct taxpayer identification number or the IRS has notified the payer of underreporting.

Biological GrowthStocks

Biological growth is the increase in a stand of timber's volume and value simply from trees continuing to grow, independent of any change in timber prices. It is a return driver unique to timberland among real assets: because standing trees keep gaining merchantable volume year over year, an owner can choose to defer harvest during a weak-price period and let biological growth add value while waiting for better market conditions.

BullionStocks

Precious metal in bulk form (bars, ingots, or coins) valued primarily by its metal content and purity rather than by rarity, design, or collector demand. Bullion is priced close to the prevailing spot price plus a modest fabrication and dealer premium.

Bullion Coin(bullion coins) Stocks

A government-minted coin, such as the American Gold Eagle, Canadian Maple Leaf, or South African Krugerrand, sold for its precious-metal content rather than as a collectible. Bullion coins trade at a premium to spot price for minting, distribution, and government backing, but that premium is small and consistent compared with rare numismatic coins. Weight and purity are guaranteed by the issuing mint, which makes them easier to resell than unmarked bars, and some jurisdictions tax them as collectibles at a rate distinct from other capital assets.

Bullion vs. Collectible CoinsStocks

A comparison between buying coins for their metal content (bullion coins, priced near spot plus a small premium) and buying coins for their rarity and grade (numismatic/collectible coins, priced mainly on collector demand). Bullion is more liquid, easier to value, and tracks the metal price closely; collectible coins can appreciate independently of metal prices but carry higher premiums, wider spreads, and valuation risk tied to grading and market fashion.

Buyer's PremiumStocks

A percentage fee added by the auction house to the hammer price and paid by the winning bidder, on top of (and separate from) any seller's commission charged to the consignor. Buyer's premiums at major houses commonly run in the 20%-27% range and often use a sliding scale that decreases as the hammer price rises, so they must be added to the bid price when budgeting a purchase.

Blue-Chip ArtStocks

Artwork by well-established, historically significant artists with long, deep auction track records and consistent institutional demand, analogous to blue-chip stocks in equity markets. Blue-chip art tends to be more liquid and less volatile than emerging-artist work, but requires far larger capital outlays and offers lower expected appreciation from already-elevated price levels.

Bonded Warehouse(storage in bond, wine in bond) Stocks

A government-approved, tax-suspended storage facility where wine or spirits can be held without import duty or VAT/excise tax being due, provided the goods stay within the bonded facility. Duty and tax become payable only when the wine is removed for consumption or delivery outside the bond, so buying and selling wine "in bond" among investors avoids triggering those taxes repeatedly.

beneficiary changeStocks

The ability of a 529 plan account owner to redesignate who the account benefits, without tax consequence, as long as the new beneficiary is a qualifying family member of the original beneficiary, such as a sibling, parent, or first cousin. This flexibility lets families reuse leftover 529 funds for another relative's education instead of taking a non-qualified withdrawal, which would owe tax and a 10% penalty on the earnings portion.

beneficiaryStocks

A person or entity entitled to receive assets, income, or benefits from a trust, retirement account, life insurance policy, annuity, or estate, as designated by the account owner, grantor, or governing document. Beneficiary designations on accounts like IRAs, 401(k)s, and life insurance policies generally override conflicting instructions in a will, making it important to keep them updated after major life events like marriage, divorce, or the birth of a child.

bond priceStocks

Bond price is the amount a bond trades for in the market, quoted as a percentage of face value (par), and it moves inversely to prevailing interest rates: when rates rise, existing bonds with lower fixed coupons become less attractive and their prices fall, and when rates fall, existing bonds become more attractive and prices rise. A bond trading above 100% of par is at a premium and one trading below is at a discount; a bond's sensitivity to rate changes is measured by its duration. At maturity, absent default, price converges to face value regardless of prior market fluctuations.

barbell strategyStocks

A barbell strategy is a fixed-income portfolio approach that concentrates holdings in short-term and long-term bonds while avoiding intermediate maturities, resembling the weight distribution of a barbell. The short-term portion provides liquidity, lower interest-rate risk, and capital for reinvestment as rates change, while the long-term portion captures higher yields and greater price appreciation potential if rates fall. The strategy trades the smoother, more predictable duration profile of a laddered or bulleted portfolio for more flexibility to react to changing rate expectations.

bullet strategyStocks

A bullet strategy is a fixed-income portfolio approach in which most or all bonds are chosen to mature at, or close to, the same target date, concentrating the portfolio's duration around a single point rather than spreading it across a range of maturities. This approach is well suited to funding a known future liability, such as a tuition payment or a bond maturing to match a planned expense, because the bulk of principal becomes available at a predictable time. Unlike a barbell strategy, a bullet portfolio offers less flexibility to react to changing interest rates before the target maturity date arrives.

brokered CDStocks

A brokered CD is a certificate of deposit issued by a bank but purchased and held through a brokerage account rather than opened directly with the bank. Brokered CDs can typically be sold on the secondary market before maturity, unlike bank-direct CDs, but selling early means the price fluctuates with interest rates and can result in a gain or loss, rather than the flat early-withdrawal penalty a bank-direct CD would charge. Brokered CDs are FDIC-insured up to standard limits per issuing bank, and buying CDs from multiple banks through one brokerage account is a common way to spread FDIC coverage across more insured principal.

buffered note(buffer note, buffered notes) Stocks

A buffered note is a structured note that absorbs a fixed percentage of the underlying reference asset's decline before the investor begins to incur losses, in contrast to a barrier note, where protection disappears entirely once the underlying breaches the barrier level. For example, a note with a 10% buffer shields the investor from the first 10 percentage points of the underlying's decline, but losses beyond that are typically borne one-for-one (or at a multiple) by the investor. Buffered notes generally cap upside participation in exchange for this partial downside protection, and the protection applies only if held to maturity. The payoff is built from options embedded in an unsecured debt obligation of the issuer, so the investor also carries issuer credit risk, and secondary market pricing before maturity can differ substantially from the formula outcome.

barrier(barrier level) Stocks

A barrier is a predetermined price level for an underlying reference asset in a structured note, autocallable, or reverse convertible that, once breached, changes the note's payoff, typically removing downside protection entirely rather than absorbing losses gradually like a buffer. If the underlying stays above the barrier through the relevant observation date, the investor generally receives full principal or a favorable payoff; if the underlying falls below the barrier, the investor becomes fully exposed to the underlying's decline. Barriers can be observed continuously throughout the note's life ('American' style) or only on specific dates ('European' style), which materially changes how likely the barrier is to be breached.

bond income(fixed-income income) Stocks

Bond income refers to the interest payments (coupons) a bondholder receives over the life of a bond, representing the income component of a bond's total return separate from any price appreciation or depreciation. Interest from most corporate and Treasury bonds is taxed as ordinary income in the year received, while interest from most municipal bonds is exempt from federal income tax and, in many cases, from state tax if the investor lives in the issuing state. Bond income is a core building block of income-oriented portfolios, valued for its relative predictability compared with equity dividends.

breakeven inflation(breakeven inflation rate) Stocks

The breakeven inflation rate is the difference between the yield on a nominal Treasury bond and the yield on a TIPS of the same maturity, representing the average annual inflation rate over that period at which the two securities would produce the same total return. If actual inflation over the holding period turns out higher than the breakeven rate, TIPS outperform the comparable nominal Treasury; if inflation comes in lower than breakeven, the nominal bond outperforms. Breakeven inflation is widely watched as a market-based gauge of investors' inflation expectations, though it also reflects a liquidity premium and other technical factors, not solely pure inflation expectations.

business brokerage account(entity brokerage account) Stocks

A business brokerage account is a taxable investment account opened in the name of a business entity, such as a corporation, partnership, or LLC, rather than an individual, allowing the entity to hold and trade securities for purposes like managing excess cash reserves or investing retained earnings. Investment gains, losses, and income generated in the account flow through to the business's own tax return, which varies by entity type: pass-through entities like S corporations and partnerships report investment income to owners on Schedule K-1, while C corporations pay corporate tax on the income directly. Opening the account generally requires entity formation documents, an Employer Identification Number, and documentation of authorized signers.

buyoutStocks

The acquisition of a controlling stake in a company by a private equity firm or management group, often taking a public company private or purchasing a division from a larger corporation. Buyouts are commonly financed with a mix of equity from the fund's investors and borrowed debt secured against the target's assets and cash flow.

business development company(BDC, business development companies) Stocks

Closed-end investment companies regulated under the Investment Company Act that lend to and invest in small and mid-sized private United States companies. They must distribute most taxable income to avoid entity-level tax, which produces high yields, and statute limits their leverage. Because holdings are private, the portfolio is carried at board-determined fair value rather than market prices, and shares often trade well away from that reported value. Full guide →

BDC(business development company) Stocks

Shorthand for business development company: a closed-end fund regulated under the Investment Company Act of 1940 that invests primarily in the debt and equity of small and mid-sized U.S. businesses, distributing most of its taxable income to shareholders to retain pass-through tax treatment. Full guide →

borrower riskStocks

The risk that a borrower fails to repay a loan on schedule or at all, driven by factors like credit history, income stability, and existing debt load. In peer-to-peer and marketplace lending, borrower risk is the primary driver of loan grade, pricing, and expected default and recovery rates, since investors have no recourse beyond the loan's terms.

Balanced Fund(hybrid fund, balanced funds) Stocks

A fund holding both stocks and bonds in a stated proportion and rebalancing back to it, commonly around 60% equities and 40% fixed income, so an investor gets a diversified allocation from a single holding. The mix is fixed by mandate rather than shifting toward a target date, which is what separates it from a target-date fund. Rebalancing inside the fund creates no taxable event for the holder, though the fund may still distribute realized gains at year end.

Bond Fund(fixed-income fund) Stocks

A mutual fund or ETF that invests primarily in bonds (government, corporate, or municipal), rather than stocks, pooling many individual bonds so investors get diversification and professional credit/duration management without buying individual bonds themselves. Bond fund share prices fluctuate with interest rates and credit conditions, and unlike an individual bond, a bond fund has no fixed maturity date at which principal is returned.

Buffer ETF(structured-outcome ETF) Stocks

A type of defined-outcome ETF that uses options on a reference index to provide a predetermined 'buffer' against losses (for example, absorbing the first 10% or 15% of index decline) over a set outcome period, typically one year, in exchange for capping the upside an investor can capture. The buffer and cap reset only at the end of each outcome period, so an investor buying mid-period gets a different effective buffer and cap than one who bought at the period's start.

Bitcoin ETFStocksCrypto

An ETF that gives investors exposure to bitcoin's price through a regular brokerage account, either by holding bitcoin directly (a spot bitcoin ETF) or by holding bitcoin futures contracts (a futures-based bitcoin ETF). The SEC approved the first spot bitcoin ETFs for US listing in January 2024, after previously approving futures-based bitcoin ETFs in 2021.

Blended FinanceStocks

A financing structure that combines catalytic capital from public or philanthropic sources (which accepts below-market returns, more flexible terms, or greater risk) with commercial capital from private investors, in order to make an otherwise too-risky project meet market-rate investors' risk/return requirements. Blended finance is most commonly used to mobilize private investment into development projects in emerging markets, with the catalytic layer absorbing a disproportionate share of the downside risk.

Base CurrencyStocks

The base currency is the first currency listed in a currency pair, representing the currency being bought or sold. Its value is always expressed in terms of the second, or quote, currency.

Boiler Room(Boiler Room Scheme, boiler rooms) StocksFutures

A boiler room is a high-pressure sales operation, often run out of a nondescript call center, where salespeople aggressively cold-call investors to push unsuitable, overpriced, or fraudulent securities using scripted pitches and manufactured urgency. The term originated from the cramped, high-pressure conditions of these operations and is a recurring pattern in SEC and FINRA enforcement actions. Operators typically hold inventory in the promoted stock and sell into the demand they create, so the buying they generate is their exit. Warning signs include unsolicited contact, urgency framing, claims of inside information, and difficulty obtaining written disclosure about who is selling.

back officeStocksCrypto

The back office is the part of a financial firm that processes and records transactions after they are agreed: confirmation, clearing, settlement, custody, reconciliation, corporate actions, books and records, and regulatory reporting. It touches no clients and takes no market risk, but a break here becomes a failed settlement, a mispriced position or a reporting violation. It is distinguished from the front office, which faces clients and markets, and the middle office, which handles risk measurement, collateral and profit and loss control.

bancassuranceStocks

Bancassurance is the distribution of insurance products through a bank branch network and customer base, either by a bank-owned insurer or under a distribution agreement with a third party. The bank earns commission and deepens its customer relationships, while the insurer buys access to a large captive audience at lower acquisition cost than a standalone agency force. The model is widespread in continental Europe and much of Asia, and it raises supervisory questions about sales conduct, product suitability and cross-selling pressure at the point of sale.

banking book accountingStocks

Banking book accounting is the accrual treatment applied to loans and securities a bank intends to hold to maturity rather than trade. Interest is recognized over time and assets are carried at amortized cost less an allowance for expected credit losses, so day-to-day market price swings do not flow through earnings. Trading book positions are instead marked to market with gains and losses recognized immediately. The split matters for capital rules, and regulators police transfers between the two books because reclassification can be used to hide losses.

bilateral collateralOptionsStocks

Bilateral collateral is margin exchanged directly between two counterparties to a derivatives or repo relationship rather than through a central clearinghouse. Terms are set in a credit support annex specifying eligible assets, haircuts, thresholds, minimum transfer amounts and valuation frequency. Variation margin moves with daily mark-to-market changes, while initial margin covers potential future exposure over a close-out period. Post-crisis rules made both mandatory for large market participants and require initial margin to be segregated so a defaulting party cannot reuse it.

bogeyStocksCrypto

A bogey is the target return or benchmark a portfolio manager is measured against, such as an index, a peer group median or a stated absolute hurdle. Performance fees, manager retention and asset flows often hinge on beating it. Because the choice of bogey determines what counts as success, an easy or poorly matched benchmark can make ordinary results look strong, which is why mandates specify the index, its currency and whether it is measured gross or net of fees and taxes.

bond dealerStocks

A bond dealer buys and sells debt securities out of its own inventory, quoting a bid at which it will buy and an offer at which it will sell, and earning the spread between them plus any change in the value of what it holds. Because most bonds trade over the counter rather than on an exchange, dealers supply the immediacy an order book would otherwise provide. Primary dealers additionally bid at government auctions and stand as counterparties to the central bank.

bond equivalent yield(BEY) Stocks

Bond equivalent yield restates the return on a discount instrument such as a Treasury bill on a basis comparable with a coupon-paying bond. Take the gain, the face value minus the purchase price, divide by the purchase price, then annualize using a 365-day year and the actual days to maturity. The adjustment matters because discount instruments are quoted on a bank discount basis that divides by face value and assumes a 360-day year, which understates the true return.

breaking the buckStocks

Breaking the buck is what happens when a money market fund whose shares are meant to hold a stable one dollar value falls below that figure, meaning investors cannot redeem for the full amount they put in. It occurs when losses on the underlying short-term debt exceed the small cushion built into the stable value accounting. The Reserve Primary Fund did so in September 2008 after writing down Lehman Brothers paper, triggering a run that prompted lasting reform of money fund pricing, liquidity and disclosure.

bubbleStocksCrypto

A bubble is a period in which the price of an asset climbs far above any value its underlying cash flows or replacement cost can justify, sustained by the expectation that someone will pay more later. Rising prices attract buyers, credit expands to fund them, and each new high is read as evidence the trend is real. Bubbles are easier to name after they deflate than while they inflate, because there is no agreed measure of fundamental value to compare the price against in real time.

Bear StearnsStocksCrypto

Bear Stearns was a New York investment bank founded in 1923 that failed in March 2008 after losses on mortgage-related assets destroyed confidence in its funding. Heavily reliant on overnight repurchase agreements and holding illiquid securitized positions, it lost access to short-term borrowing within days. JPMorgan Chase agreed to buy it in a deal the Federal Reserve supported by financing a portfolio of hard-to-value assets, at a price initially set at two dollars a share and later raised to ten. The episode is treated as the first systemic failure of the 2008 crisis.

Bid SizeStocksCrypto

Bid size is the quantity of shares or contracts buyers are willing to purchase at the best bid price, displayed alongside the quote and often expressed in round lots. Compared with the offer size on the other side, it shows how much depth stands immediately behind the current price and therefore how far a market order of a given size will move it. Displayed size can understate real interest, because hidden and iceberg orders reveal only part of their quantity to the book.

BondholderStocks

A bondholder is the owner of a debt security and therefore a creditor of the issuer, entitled to the interest payments and the return of principal set out in the indenture. That claim ranks ahead of every class of equity in a liquidation, and its terms are contractual rather than discretionary, so missing a payment is a default. Bondholders normally have no vote on ordinary corporate matters, exercising influence instead through covenants, and through consent rights when the issuer wants to amend the terms.

Buy to CoverStocksCrypto

Buy to cover is the order type that closes a short position by purchasing the shares needed to return the borrowed stock to the lender. The short seller profits if the purchase price is below the original sale price and loses if it is above, with the loss theoretically unbounded because a share price has no ceiling. Brokers can force the transaction without notice if the loan is recalled or if account equity falls below the margin maintenance requirement.

Buying on MarginStocksCrypto

Buying on margin means borrowing from a broker against the securities in an account to purchase more than the cash on deposit would allow. The initial loan is capped by regulation, in the United States by Federal Reserve Regulation T, and the account must then keep equity above a maintenance level set by the exchange and often higher by the broker. Interest accrues on the balance, and if equity falls below the maintenance level the broker issues a margin call and may sell positions to restore it.

borrowingCrypto

Taking a loan against deposited crypto collateral, either in a lending protocol or from a centralized lender. The borrower posts collateral, draws a smaller amount of another asset, and pays a variable rate set by pool utilization. No credit assessment takes place, because the collateral ratio does that work. If collateral value falls so the loan-to-value crosses the liquidation threshold, a liquidator may repay the debt and take the collateral at a discount.

Bayesian methodsStocksCrypto

Statistical techniques that start from a prior distribution representing existing belief about a parameter, then update it with observed data using Bayes' theorem to produce a posterior distribution. The output is a full distribution of plausible values rather than a single point estimate, which makes uncertainty explicit. In finance they are used for return estimation, regime detection, and blending model output with judgment, most familiarly in the Black-Litterman framework.

bank loansStocks

Senior secured loans to below-investment-grade companies, originated by banks and syndicated to institutional investors. Coupons float over a short-term reference rate, so income rises with rates while price sensitivity to them stays small. They rank ahead of bonds in the capital structure and are secured, which has historically supported higher recoveries. Settlement is slower than for bonds, and covenant protection varies widely from deal to deal.

barrier notesStocks

Structured notes whose principal repayment depends on whether a reference asset touches or closes below a specified barrier during the term. While the barrier holds, the investor receives the stated coupon or return and full principal. If it is breached, repayment converts to the reference asset's performance, so losses can be large. The barrier may be observed continuously or only at maturity, and that choice changes the risk materially.

base caseStocks

The central scenario in an investment analysis, built from the assumptions an analyst considers most likely rather than optimistic or conservative ones. It anchors a valuation and is normally presented alongside upside and downside cases so the range and its drivers are visible. Its usefulness depends on the assumptions being stated explicitly and being testable, because an unstated base case cannot be challenged when evidence changes.

basketStocks

The specific list of securities and cash an authorized participant delivers to, or receives from, an ETF when creating or redeeming a block of shares. The fund publishes it each day. Because creation and redemption happen in kind, the basket is how the fund adjusts its portfolio and how it moves low-basis securities out without realizing a taxable gain, which is the source of the wrapper's tax efficiency.

battery-storage projectsStocks

Grid-connected installations that charge batteries when power is cheap or abundant and discharge when it is scarce, earning revenue from that price spread plus payments for capacity and for grid services such as frequency regulation. Returns depend on the market rules of the specific grid, contracted offtake, cell degradation over cycles, and the interconnection queue. Stacking several revenue streams is common, and each stream carries its own contract term.

beneficiary rulesStocks

The provisions determining who inherits a retirement account and how quickly they must withdraw. The beneficiary named on the account form controls, overriding a will, which is why unreviewed forms are a common estate problem. Under United States law a surviving spouse has options a non-spouse does not, and most non-spouse beneficiaries must empty an inherited account within a set number of years. Periods and exceptions are set in the Internal Revenue Code.

bond portfolio managementStocks

Building and maintaining a fixed-income portfolio against an objective, whether tracking an index, generating a required income stream, or matching future liabilities. The main levers are duration, which sets sensitivity to interest rates, yield-curve positioning, credit quality, and sector allocation. Common techniques include laddering, barbell and bullet structures, and immunization, which matches portfolio duration to a liability so rate moves on each side offset.

bonded storageStocks

A licensed warehouse where goods sit under customs control with duty and excise tax suspended until they are released for consumption. In wine and spirits investing this matters because stock held in bond can change hands between owners without triggering those taxes, and the warehouse maintains provenance records and controlled conditions. Removing goods from bond crystallizes the duty and, for many collectibles, narrows the pool of onward buyers.

bootstrappingStocks

A resampling method that estimates the distribution of a statistic by repeatedly drawing samples with replacement from observed data and recalculating the statistic each time. It produces confidence intervals without assuming a particular distributional form, which suits financial returns. For time series, plain resampling destroys autocorrelation, so block bootstraps that resample contiguous stretches are used instead. In fixed income the same word means deriving a zero-coupon curve from coupon bond prices.

bottle formatsStocks

The standard sizes in which wine and spirits are bottled, from half bottles up through magnums to larger formats. Format affects collectible value because larger bottles age more slowly relative to their volume, are produced in smaller numbers, and are favored at auction, so a magnum often sells for more than the same volume in standard bottles. Very large formats can trade at a discount because storage and serving are impractical.

bridge loansStocks

Short-term loans funding a borrower until a defined exit occurs, typically a property sale, a refinancing into permanent debt, or the completion of a renovation or lease-up. They price above long-term debt, often carry fees at both origination and exit, and may be interest-only. The lender underwrites the exit as closely as the borrower, because repayment depends on that specific event happening roughly on schedule.

brokered CDsStocksCrypto

Certificates of deposit issued by banks but sold through brokerage firms and held in a brokerage account. They can be sold in a secondary market before maturity instead of surrendered to the bank for an early-withdrawal penalty, which means proceeds move with interest rates and can fall below face value. Federal deposit insurance applies per issuing bank, so holding several banks' certificates in one account can extend total coverage. Full guide →

buffered ETFsStocks

Exchange-traded funds using options on a reference index to absorb a stated percentage of losses across a defined outcome period, in exchange for a cap on gains. Buffer and cap apply only from the start of that period to its end, so an investor buying part-way through faces a different effective range. Dividends of the reference index are generally not received, because the exposure is held through options rather than shares.

business acquisitionStocks

Buying an existing operating company rather than starting one. The process runs from sourcing and a letter of intent through diligence on financial records, customer concentration, and legal exposure, to a purchase agreement structured as either a share or an asset deal. Price is usually quoted as a multiple of a normalized earnings measure, and financing typically combines buyer equity, bank or SBA debt, and a seller note.

business-sale marketplacesStocks

Online listing platforms where owners advertise operating businesses for sale and buyers search by industry, geography, and asking price. Listings are prepared by the seller or a broker and typically quote revenue and a discretionary earnings figure, neither of which is audited. They lower search cost, but adverse selection is high because the strongest businesses often transact privately, so verifying the financial record remains the buyer's own work.

Biodiversity CreditStocks

A biodiversity credit is a tradable unit representing a measured and independently verified gain in the condition or extent of nature at a defined site, such as restored habitat or improved species outcomes, sustained for a stated period. A methodology specifies what is measured, the baseline it is measured against, and how long the outcome must be maintained. Buyers use credits to fund or claim contribution to nature outcomes. The market is early-stage, methodologies differ, and unlike carbon there is no single interchangeable unit, because habitat gains are place-specific.

Blue Carbon CreditStocks

A blue carbon credit is a carbon credit generated by protecting or restoring coastal and marine ecosystems, principally mangroves, tidal salt marshes and seagrass meadows, which store carbon in living biomass and in waterlogged sediment. A project quantifies emissions avoided or carbon sequestered against a baseline, has the calculation verified against a published methodology, and issues credits each representing one tonne of carbon dioxide equivalent. These habitats store a large amount of carbon per hectare, but measuring sediment stocks and proving permanence against storms and rising seas is harder than for forest projects.

Book Royalty(book royalties) Stocks

A book royalty is the share of a book's revenue paid to the author under a publishing contract. It is expressed as a percentage of either the list price or the publisher's net receipts, with different rates for hardback, paperback, ebook and audio editions, and it is normally paid only after any advance has been earned back. Statements are issued on a fixed cycle, often twice a year, and may withhold a reserve against future returns from retailers, so reported earnings lag actual sales.

BundStocks

A Bund is a bond issued by the Federal Republic of Germany at the long end of its curve, typically with an original maturity of ten years or more, sold through the German Finance Agency by auction to a group of approved bidders. Bunds are the benchmark for euro-denominated government debt: their yields are the reference against which other euro sovereign issuers are quoted as a spread, and the futures contract on them is one of the most heavily traded interest rate instruments in Europe. Shorter German maturities carry different names.

Bank CapitalStocks

Bank capital is the portion of a bank's funding that comes from shareholders and from instruments able to absorb losses, rather than from depositors and other creditors. It is the buffer between a fall in asset values and a failure to repay depositors. Regulators define tiers by loss-absorbing quality, with common equity ranking highest, and set minimum ratios of capital to risk-weighted assets plus additional buffers. Because higher capital limits the leverage a bank can run, requirements directly affect how much it can lend on a given equity base.

Bond FuturesStocks

A bond future is an exchange-traded contract to deliver a government bond at a set price on a future date. Rather than naming one specific bond, the contract specifies a notional bond and a basket of deliverable issues, with conversion factors adjusting for their different coupons and maturities; the short position chooses which to deliver, and the one that is economically best to deliver is called the cheapest to deliver. The contracts are used to hedge interest rate exposure and to take duration positions without buying bonds outright.

Buy-SideStocks

The buy-side is the part of the investment industry that invests money, as opposed to the sell-side, which originates and distributes securities and provides execution and research. Asset managers, pension funds, insurers, endowments, hedge funds and family offices sit on it. Buy-side analysts produce research for internal decisions rather than for publication, and buy-side traders seek execution at the best available terms rather than making markets. The distinction matters for regulation, for how research is paid for, and for where conflicts of interest arise.

Back-to-Back LoanStocks

A back-to-back loan is a pair of matched loans between two companies in different countries, each lending its home currency to the other for the same term and equivalent amount at the prevailing spot rate. Each side obtains funding in the currency it needs without buying that currency in the market, and the two obligations offset at maturity. The structure predates the currency swap, which achieves the same exposure inside one contract with cleaner netting and credit treatment, and it survives mainly where capital rules block direct cross-border lending.

Banque d'AffaireStocksCrypto

A banque d'affaires is a French merchant bank that takes and holds long-term equity stakes in industrial companies alongside advisory and financing work, rather than confining itself to deposit taking and lending. That model gave the bank board representation and a durable ownership interest in the firms it financed, which shaped much of French corporate ownership through the twentieth century. Regulatory change and the move toward universal banking eroded the distinction, so the phrase now generally reads as investment bank.

Bear NoteStocks

A bear note is a structured debt security whose redemption amount rises when a specified reference falls. The issuer embeds a short position in an index, a currency pair, a commodity or an interest rate, so the investor receives more than par if the reference declines and less if it rises. Principal may be fully at risk or partly protected depending on the terms, and the buyer takes the issuer's credit risk alongside the market view, because the payoff is an unsecured obligation rather than a holding of the reference.

Bond ValueStocks

Bond value is the present value of a bond's remaining cash flows, found by discounting each coupon and the redemption amount at the yield the market requires for that maturity and credit quality. Because the discount rate sits in the denominator, value moves inversely to yield, and the sensitivity grows with maturity and shrinks as the coupon rises. In convertible analysis the same phrase names the investment floor: what the security would be worth as straight debt if the conversion right expired worthless.

Bulk RiskStocks

Bulk risk is the exposure a lender or insurer carries because a small number of very large positions dominate its book, so a single default or claim can consume a disproportionate share of capital. It is measured by comparing the largest individual exposures with capital and with the whole portfolio rather than by looking at averages, since portfolio-wide default statistics understate what one outsized name can do. Regulatory and internal limits on single-name and connected-group exposure exist to contain it.

Bull NoteStocks

A bull note is a structured debt security whose redemption amount rises with a specified reference such as an equity index, a commodity or a currency pair. The issuer embeds a long position in that reference, so the investor gives up a conventional coupon in exchange for participation in an upward move, sometimes with a cap and sometimes with partial principal protection. Payment depends on the issuer staying solvent, because the note is an unsecured claim rather than direct ownership of the reference.

Bretton WoodsStocks

Bretton Woods was the monetary system agreed by delegates from 44 nations in New Hampshire in 1944, under which member currencies were pegged within narrow bands to the United States dollar and the dollar was convertible into gold at a fixed official price. The conference also created the International Monetary Fund to lend to countries under balance of payments strain and the institution that became the World Bank. Gold convertibility was suspended in 1971, and the major currencies moved to floating rates soon after.

Bank Bill Swap Rate(BBSW) Stocks

The bank bill swap rate is the Australian benchmark for short-term wholesale funding, published for tenors from one to six months and used to set coupons on floating rate notes, loans and interest rate swaps denominated in Australian dollars. It is calculated from executable bids and offers for prime bank bills observed in a defined trading window, with the administrator falling back to a defined waterfall if transaction data is insufficient. Oversight sits with the exchange operator that administers it under Australian financial benchmark regulation.

Bank Stress TestStocks

A bank stress test projects how a bank's capital would hold up under a severe but plausible hypothetical scenario, typically covering a deep recession, sharp asset price falls and a spike in unemployment over several quarters. Supervisors specify the scenario, banks or the supervisor's own models project revenue, losses and risk-weighted assets under it, and the resulting minimum capital ratio is compared with the required floor. Results in major jurisdictions feed directly into how much a bank may distribute in dividends and buybacks.

Basel IIStocks

Basel II is the international bank capital framework published by the Basel Committee on Banking Supervision in 2004, replacing the simpler 1988 accord. It introduced the three-pillar structure: minimum capital requirements calculated with far more risk sensitivity and an explicit charge for operational risk, supervisory review of each bank's own capital adequacy assessment, and market discipline through mandatory public disclosure. It also allowed large banks to use internal models for credit risk. Weaknesses exposed in the 2008 crisis led to the Basel III revisions.

Bearer BondStocks

A bearer bond belongs to whoever physically holds the certificate, with no register of owners kept by the issuer. Interest was claimed by clipping and presenting attached coupons, which is the origin of the word coupon. Because ownership left no paper trail, the format was attractive for tax evasion and money laundering, and the United States effectively ended new domestic issuance in 1982 with other jurisdictions following. Existing certificates have almost entirely matured, and today's bonds are held in registered or book-entry form.

Bearer ShareStocks

A bearer share is an equity certificate whose owner is whoever possesses the document, so title transfers by physical delivery and the company keeps no shareholder register for it. That anonymity made the form useful for concealing beneficial ownership, and international transparency standards have pushed jurisdictions to abolish it, immobilise the certificates with a custodian, or convert them into registered shares. Most major financial centres have now eliminated or restricted the format, and remaining holders generally must register to exercise voting or dividend rights.

Bespoke CDOStocks

A bespoke collateralised debt obligation is a single-tranche structure assembled for one investor, referencing a portfolio of credits chosen to fit that buyer's view and risk appetite. Rather than issuing a full capital structure, the dealer sells only the slice the client wants and hedges the remaining exposure in the credit default swap market. Marketed after the financial crisis as bespoke tranche opportunities, these deals are synthetic, so exposure comes through credit derivatives rather than ownership of the underlying bonds or loans.

Bitcoin Misery IndexCrypto

The Bitcoin Misery Index is a proprietary sentiment gauge introduced by Fundstrat that scores conditions in the bitcoin market on a scale from zero to one hundred, combining the proportion of profitable trades with a measure of volatility. Low readings are meant to indicate widespread investor discomfort and high readings widespread comfort, with the designer treating it as a contrarian indicator. It is a vendor-published composite rather than an exchange or index-provider benchmark, and its exact construction is not fully disclosed.

Bloomberg TerminalOptionsStocks

The Bloomberg Terminal is a subscription software and data service that delivers market prices, reference data, news, analytics, research and trade messaging on a single system, accessed through a keyboard-driven command language of function codes. Its instant messaging network is a de facto communication standard among institutional traders, which is a large part of why the platform is entrenched. It is licensed per user at a published annual rate and is a private commercial product, not a market utility or regulated infrastructure.

Bond RatingStocks

A bond rating is a credit rating agency's opinion of how likely an issuer is to pay a specific debt obligation in full and on time, expressed on a letter scale that runs from the highest grades down through speculative categories to default. Agencies assess financial strength, cash flow, leverage, industry position, structural features such as collateral and subordination, and any government or parent support. Ratings feed pricing, index eligibility and mandate limits, but they are opinions about credit risk alone, not about price, liquidity or suitability.

Book-to-Market RatioStocks

The book-to-market ratio divides a company's accounting equity by its market capitalisation, so a high reading means the market values the business at less than the balance sheet carrying amount of its net assets. It is the inverse of the price-to-book ratio and is the form used in academic asset pricing, where it defines the value factor in the Fama and French three-factor model. Companies whose value sits mainly in intangibles or brands tend to show low readings because those assets are largely uncapitalised.

Bridge FinancingOptionsStocks

Bridge financing is short-term funding that covers a gap until a larger or permanent source of capital arrives. In acquisitions a bridge loan funds the purchase at closing and is repaid from a subsequent bond issue, equity raise or asset sale, with pricing that steps up over time to push the borrower to refinance. In venture capital a bridge round carries a company to the next priced round, often as a convertible note. The lender's exposure is that the intended take-out never materialises.

Brokerage AccountStocks

A brokerage account is an arrangement with a licensed firm that holds an investor's cash and securities and executes buy and sell orders on their instruction. Cash accounts require full payment for purchases, while margin accounts permit borrowing against holdings subject to regulatory and house requirements. Assets are usually registered in the firm's name for settlement efficiency and held in custody for the client. In the United States, member firm accounts carry Securities Investor Protection Corporation coverage against firm failure, which protects against loss of the securities rather than against market losses.

Bank RatingStocks

A bank rating is an assessment of a bank's financial strength and its capacity to meet obligations, published either by a credit rating agency or produced privately by a supervisor. Agency ratings sit on lettered scales and influence funding costs and counterparty limits. Supervisors in the United States assign a confidential CAMELS score covering capital adequacy, asset quality, management, earnings, liquidity and sensitivity to market risk, which drives examination intensity and permitted activities but is not published.

Bad Debt Reserve(allowance for doubtful accounts) Stocks

A bad debt reserve is a contra-asset account that reduces reported accounts receivable to the amount a company expects to collect. It is built by charging an expense to the income statement, estimated from historical loss rates, the ageing of balances and forward-looking economic expectations under current expected credit loss standards. When a specific balance is judged uncollectable it is written off against the reserve, which at that point affects neither profit nor the net receivable figure.

BANKINGStocksCrypto

Banking is the business of taking deposits repayable on demand or at notice and using those funds to make loans and investments, earning the spread between what is paid to depositors and received from borrowers. Because deposits are short term while loans are long term, banks run maturity transformation and depend on confidence, which is why they face capital and liquidity requirements, deposit insurance and central bank facilities. Payments, custody, trade finance and advisory work provide fee income alongside the spread.

Basket OptionOptionsStocks

A basket option is an option written on a weighted group of underlying assets, paying off on the value of the basket as a whole rather than on each component separately. Because the basket's volatility depends on the correlations between its members as well as on their individual volatilities, it is normally cheaper than buying options on each component. Corporates use currency baskets to hedge multi-currency exposure, and investors use equity baskets for sector or thematic positions.

Bear RaidStocks

A bear raid is a coordinated attempt to drive a security's price down for profit, typically by combining heavy short selling with the spread of negative information. Participants gain if the falling price triggers stop orders, margin calls and forced liquidation that accelerate the decline. Deliberate manipulation of this kind is prohibited under securities laws, and rules such as restrictions on short selling after a sharp intraday drop exist to limit the pressure. Short selling based on research is a separate matter.

Best Efforts UnderwritingStocks

In a best efforts underwriting the investment bank agrees only to use reasonable effort to sell a securities issue as the issuer's agent, taking a commission on what it places, and does not buy the securities itself. Unsold securities stay with the issuer, so the risk of a weak reception rests there rather than with the bank. This contrasts with a firm commitment, where the underwriters purchase the whole issue and resell it. Variants include all-or-none and minimum-maximum arrangements.

Blind BidStocksCrypto

A blind bid is an offer to buy a portfolio of securities without being told exactly what it contains, with the seller disclosing only summary characteristics such as sector mix, market capitalisation range, liquidity profile and total size. Dealers bid a spread or a commission on that basis, which protects the seller from information leakage that could move prices before the trade completes. The bidder prices the uncertainty into the quote, and the contents are revealed only after the trade is awarded.

Block Trading FacilityOptionsStocks

A block trading facility is an exchange mechanism that lets counterparties negotiate a large trade away from the central order book and then report it to the exchange for clearing, provided the trade meets a published minimum size and the exchange's price rules. It exists because pushing a very large order through the visible book would move the price against the initiator. Exchanges set minimum thresholds by contract and require prompt reporting so the trade still appears in official volume.

BOLSAStocks

Bolsa is the Spanish and Portuguese word for a stock exchange, derived from the term for a purse, and it forms part of the formal name of several markets including Bolsa Mexicana de Valores and Bolsa de Madrid. English financial writing often uses it to refer to Latin American or Iberian equity markets collectively. It is not a technical term with mechanics of its own: each named bolsa has its own listing rules, trading hours and clearing arrangements.

Bond VigilantesStocks

Bond vigilantes are investors who sell government or corporate bonds, pushing yields higher, to protest fiscal or monetary policies they judge inflationary or unsustainable, imposing a market discipline that legislation does not. The phrase was coined by the economist Ed Yardeni in the 1980s. Their influence comes from the fact that a government must keep refinancing debt, so a sustained rise in required yields raises borrowing costs and can force a change in budget plans.

BUDGETStocks

A budget is a plan setting expected income and expenditure for a future period, used to allocate resources and to measure actual results against intent. Households use one to match spending and saving to income, companies build operating and capital budgets that roll into forecast financial statements, and governments legislate budgets that set spending and taxation. Variance analysis compares outcome with plan and separates differences caused by volume, price and efficiency so the causes can be addressed.

Bulge BracketStocks

Bulge bracket refers to the largest global investment banks, the firms that lead the biggest underwriting and advisory mandates. The name comes from the printed tombstone advertisement for an offering, where the lead managers' names were set in larger type at the top, bulging above the rest of the syndicate. Membership is informal and shifts with league table position, mergers and failures, and these firms typically combine underwriting, advisory, sales and trading, research and asset management.

Bunny BondStocks

A bunny bond gives the holder the choice, at each coupon date, of taking the interest in cash or reinvesting it in more bonds of the same issue at the same coupon rate. Choosing reinvestment removes the need to redeploy coupons at whatever market rate prevails, so the holding multiplies, which is where the nickname comes from. The feature is a contractual coupon reinvestment right, and the issuer prices that embedded option into the terms of the issue.

Busted ConvertibleStocks

A busted convertible is a convertible bond whose underlying share price has fallen so far below the conversion price that the conversion feature is close to worthless, leaving the security to trade on its fixed income characteristics alone. Its price then tracks yield and issuer credit rather than the equity, and its equity sensitivity, or delta, approaches zero. Investors analyse it as high yield or distressed debt, focusing on the bond floor, any put dates and recovery prospects.

Buy the BookStocks

Buy the book is an instruction to purchase all the shares available at the current offer price from every source willing to sell at that level, including the specialist or designated market maker's book and other displayed orders. It is a large, aggressive order used when a buyer wants size immediately rather than a better average price. Because it consumes displayed liquidity, it usually pushes the quoted price up and reveals the presence of a determined buyer.

Big Mac indexStocks

The Big Mac index is an informal measure of currency valuation published by The Economist since the 1980s, comparing the local price of a single standardised product across countries. Dividing the local price by the US price gives an implied exchange rate, and comparing that with the market rate suggests whether a currency looks cheap or expensive relative to purchasing power parity. It is deliberately light-hearted: local wages, rents, taxes and competition all affect burger prices independently of currency values.

Black's Model(Black-76) OptionsStocks

Black's model prices European options on forward or futures prices. It modifies the Black-Scholes framework by replacing the spot price with the forward price and discounting the expected payoff at the applicable interest rate, which removes the need to model the cost of carry separately. It is the market standard for interest rate caps, floors and European swaptions, where each caplet is treated as an option on a forward rate, and for options on commodity futures.

bank discount yieldStocks

A quoting convention for Treasury bills and other short-term discount instruments that states the discount from face value as an annualized percentage of face value, using a 360-day year. Because it divides by par rather than by the price actually paid and ignores compounding, it understates the return an investor earns. Analysts convert it to a bond equivalent yield or a money market yield before comparing a bill with a coupon-bearing security.

Basket Credit SwapStocks

A credit derivative referencing several borrowers at once, where protection pays out on a specified ordinal default rather than on every name. In a first-to-default basket the seller pays once, on whichever reference entity fails first, and the contract then terminates. Pricing turns heavily on default correlation across the basket: the more the names move together, the less the seller charges for first-to-default protection and the more for second or later triggers.

BOUTIQUEStocks

A small financial firm concentrating on a narrow set of services or clients rather than offering a full product range. Advisory boutiques take merger and restructuring mandates without underwriting or lending alongside them, which they present as freedom from the conflicts a full service bank carries. Asset management boutiques run a single strategy or asset class. The trade-off is limited distribution, balance sheet and research coverage relative to a large integrated institution.

Basket TradeStocks

A single order covering many securities at once, executed as one package rather than as separate tickets. Index funds use them to invest cash or reflect an index change, and exchange-traded fund market makers use them to assemble or break apart creation units. Brokers may guarantee execution of the whole list at the closing price or at a spread to it, taking on the risk that individual names move, and program trading desks route the components automatically.

Banking DirectiveStocks

European Union legislation harmonizing the authorization and prudential supervision of credit institutions across member states. The First and Second Banking Directives established a single licence, allowing a bank authorized in one member state to operate throughout the bloc under home country supervision. Successor legislation, the Capital Requirements Directive and its accompanying regulation, carries the Basel capital, liquidity and governance standards into directly applicable European law.

Bond SwapStocks

Selling one bond and buying another at the same time, to change a portfolio's position rather than to raise or invest cash. Motives include extending or shortening duration, moving up or down in credit quality, picking up yield where two similar bonds are priced differently, and realizing a loss for tax purposes while staying invested. A United States investor executing a tax swap must avoid buying a substantially identical security within the window that triggers the wash sale rule.

Back-End RatioStocks

A mortgage underwriting measure comparing a borrower's total monthly debt payments, including the proposed housing cost plus car loans, student loans, credit card minimums and other obligations, against gross monthly income. It is stated as a percentage, and lenders and loan programs each set the maximum they accept, with compensating factors such as cash reserves or a large down payment sometimes allowing a higher figure. The front-end ratio is the narrower version counting only the housing payment.

Balanced Investment StrategyStocks

An allocation holding meaningful amounts of both equities and bonds, so growth from shares is moderated by the income and generally steadier prices of fixed income. Traditional versions target a set split and rebalance back to it periodically, which mechanically sells what has risen and buys what has fallen. The mix reduces the depth of drawdowns relative to an all-equity portfolio without eliminating them, since both sleeves can fall together when interest rates rise sharply.

Bid and AskStocksCrypto

The two sides of a market quote: the bid is the highest price a buyer is currently willing to pay, and the ask, also called the offer, is the lowest price a seller will accept. Each is shown with the quantity available at that price. A market order to sell fills at the bid and a market order to buy fills at the ask, so the gap between them is an immediate cost of trading and widens whenever liquidity thins.

Bond MarketStocks

The market where debt securities are issued and traded, spanning government, municipal, corporate, mortgage-backed and asset-backed sectors. Most secondary trading takes place over the counter between dealers and clients rather than on an exchange, so quotes are dealer-driven and liquidity varies enormously between benchmark government issues and small corporate lines. Prices are usually discussed as yields or as spreads over a government or swap reference, since that strips out coupon and maturity differences.

baseline forecastsStocks

A baseline forecast is the central projection an institution publishes for growth, inflation, revenue or spending, built on stated assumptions and on the policy currently in force. It is the reference against which alternative scenarios and stress cases are measured, so the effect of a proposed change is read as the difference from the baseline rather than as a standalone number. Central banks and budget offices publish baselines and revise them as data arrives.

bond strippingStocks

Bond stripping separates a coupon bond into its individual cash flows, so each interest payment and the final principal repayment becomes a separately tradable zero-coupon security. A custodian or the issuing government holds the original bond and issues receipts against each dated payment. The pieces can be sold to investors matching a specific future liability, and the process is reversible: reassembling a full set of strips reconstitutes the original bond.

bundling, unbundlingOptionsStocks

Bundling and unbundling are the two directions of financial engineering. Bundling combines several cash flows or securities into one composite instrument, as when mortgages are pooled into a pass-through certificate. Unbundling splits an instrument into separately tradable components, as when a bond is stripped into interest and principal pieces or a warrant is detached from a convertible. Both exist to let investors buy exactly the exposure they want rather than an inseparable package.

Bad Debt ExpenseStocks

Bad debt expense is the cost recorded when receivables already recognized as revenue are judged uncollectible. Under the allowance method the company estimates the uncollectible share in the same period as the sale, charging expense and building a contra-asset allowance against receivables, so the balance sheet shows the amount expected to be collected. Specific accounts are later written off against the allowance, which does not touch reported income a second time.

Bail-InStocks

A bail-in imposes losses on a failing bank's shareholders and creditors by writing down their claims or converting them into equity, recapitalizing the institution without public money. Resolution authorities apply it in order of seniority, so equity absorbs losses first, then subordinated debt, then senior unsecured claims, while insured deposits are protected. Banks are required to maintain a minimum stock of eligible liabilities so enough loss-absorbing capacity exists when the tool is needed.

Bank Confirmation LetterStocks

A bank confirmation letter is a document a bank issues verifying facts about a customer's relationship with it, most often the existence and size of a credit line, account balances, or that funds are available. Auditors request them directly from the bank so the evidence does not pass through the client. The letter confirms status as at a date and is not itself a commitment to lend or a guarantee of the customer's obligations.

Bank CreditStocks

Bank credit is the total borrowing a bank makes available to a customer, counting drawn loans and undrawn lines, set from an assessment of income, existing debt, collateral and repayment history. In macroeconomic statistics the same term describes the aggregate of loans and securities held by the banking system, which central banks track because its growth drives money supply and shows how freely credit is reaching households and firms.

Basel IIIStocks

Basel III is the set of international bank regulatory standards agreed by the Basel Committee on Banking Supervision after the 2008 financial crisis. It raises the quantity and quality of capital banks must hold against risk-weighted assets, adds buffers that build up in good times, introduces a leverage ratio not based on risk weights, and sets liquidity standards covering a short stress period and longer-term funding stability. National regulators implement it through their own rules and timetables.

Basket of GoodsStocksCrypto

A basket of goods is the fixed list of products and services, weighted to reflect typical household spending, whose prices a statistical agency tracks to construct a consumer price index. Measuring the same basket repeatedly isolates price change from changes in what people buy. Agencies update the contents and weights periodically as spending patterns shift, and they adjust for quality changes, both of which affect the inflation rate the index reports.

Bear TrapStocks

A bear trap is a price move that breaks below a support level and prompts traders to sell short or exit, then quickly reverses upward and forces those positions to be closed at a loss. The buying that follows as shorts cover can accelerate the rebound. The pattern is only identified after the fact, since a genuine breakdown looks identical while it is happening, which is why traders treat single breaks of support cautiously. Full guide →

Bird In HandStocks

The bird in hand argument holds that investors value a dividend received today more highly than an uncertain capital gain of the same expected size, so a company paying out more would face a lower required return and command a higher valuation. Myron Gordon and John Lintner put it forward against Modigliani and Miller's proposition that dividend policy has no effect on value in a market without taxes or transaction costs.

Black FridayFuturesStocks

Black Friday has two established meanings in finance. Historically it refers to 24 September 1869, when an attempt to corner the United States gold market collapsed, the gold price crashed and many speculators were ruined. In modern usage it names the shopping day after the American Thanksgiving holiday, watched by retailers and investors as an early read on consumer spending in the fourth quarter. Other national panics have also carried the label.

Book Value Per Common ShareStocks

Book value per common share divides the equity attributable to common shareholders by the number of common shares outstanding. The numerator is total shareholders' equity less preferred equity and any amount owed to preferred holders, so it measures the accounting claim per share on assets after all liabilities. Because assets are carried largely at historical cost, the figure understates companies whose value lies in brands, research or software rather than physical property.

Bottom-Up InvestingStocks

Bottom-up investing selects securities on the merits of the individual company, examining its products, margins, balance sheet, management and valuation, and treats the sector or economy it operates in as secondary. The portfolio's sector and country exposures fall out of the stock choices rather than being set first. The contrast is top-down investing, which starts by forming a view on economies, sectors or currencies and then fills each allocation with representative holdings.

Branch AccountingStocks

Branch accounting keeps a separate set of books for each branch, division or location of a business, so the revenue, costs and often the assets of each unit can be measured on their own. The branch records its own transactions and a current account tracks balances owed between branch and head office, which are eliminated when the accounts are combined. It gives managers unit-level accountability at the cost of extra bookkeeping and consolidation work.

Branch ManagerStocks

A branch manager runs a single office of a bank or brokerage firm, with responsibility for its staff, its clients, its sales results and its compliance with firm procedures. In United States securities firms the role requires a supervisory registration, and the manager must review account openings, approve certain transactions, handle customer complaints and supervise the registered representatives in the office. Supervisory failures can lead to regulatory action against the manager personally.

Brokerage FeeStocks

A brokerage fee is what an intermediary charges for arranging a transaction on a client's behalf. In real estate it is usually a percentage of the sale price, agreed in the listing contract and divided between the listing and buying sides at closing. In securities it can be a commission per trade, a percentage of assets, or a spread built into the execution price. Fees may be negotiable and must be disclosed under the relevant conduct rules.

Budget VarianceOptionsStocks

A budget variance is the difference between a budgeted figure and the actual result for the same period, reported as favorable when it improves profit and unfavorable when it reduces profit. Analysis splits the total into a price or rate variance and a quantity or efficiency variance, which separates paying a different amount per unit from using a different number of units. Managers investigate variances above a materiality threshold rather than every difference.

Build America BondsStocks

Build America Bonds were taxable municipal bonds that United States state and local governments could issue under the American Recovery and Reinvestment Act during 2009 and 2010. Instead of paying tax-exempt interest, issuers paid a taxable coupon and received a direct federal subsidy toward the interest cost, or gave investors a tax credit. The design widened the buyer base to pension funds and foreign investors who gain nothing from tax exemption. The authority expired and was not renewed.

BullStocks

A bull is a market participant who expects prices to rise and positions accordingly, by buying an asset, holding it, or using derivatives that gain when it appreciates. The word also describes the market itself: a bull market is a sustained advance, conventionally dated from a low once a decline of a fifth or more has been recovered. The opposite in both senses is a bear, who expects and positions for falling prices.

Bullet BondStocks

A bullet bond repays its entire principal in one payment at maturity, with only interest paid in the meantime, and carries no call, put or sinking fund provision that could change the schedule. The fixed timing makes it straightforward to value and to match against a known future liability. Because the issuer cannot retire it early, the holder faces no reinvestment surprise, while the issuer cannot refinance the debt if rates fall.

Bureau of Labor StatisticsStocksCrypto

The Bureau of Labor Statistics is the statistical agency of the United States Department of Labor, responsible for measuring labor market activity, working conditions and price change. Its releases include the monthly employment situation report covering payrolls and the unemployment rate, the consumer price index, the producer price index, and data on productivity and wages. The schedule is published in advance and the figures move interest rate expectations and asset prices on release.

Business ActivitiesStocks

Business activities are the transactions a company undertakes, grouped in the cash flow statement into three categories. Operating activities cover the core trade of selling goods or services and the working capital supporting it. Investing activities cover buying and selling long-lived assets and investments. Financing activities cover raising and repaying debt and equity and paying dividends. Separating them shows whether cash comes from the business itself or from outside funding.

Business Exit StrategyStocks

A business exit strategy is the plan by which an owner or investor converts a stake in a private company into cash or liquid securities. Common routes are a trade sale to a strategic buyer, a sale to a financial sponsor, a management buyout, an initial public offering, a transfer to family members, or an orderly wind-down. The route chosen affects valuation, tax treatment, how long the process takes and how much of it the owner controls.

Buy Limit OrderStocksCrypto

A buy limit order instructs a broker to buy a stated quantity at or below a specified price, and never above it. It is placed below the current market, so it executes only if the price falls to the limit and enough sellers are available at that level. The limit prevents paying more than intended, at the cost of the order possibly never filling, or filling only in part if the price rebounds before the full quantity trades.

B-SHARESStocksCrypto

A label with two distinct meanings that depend on the market. In mainland China it denotes the class listed in Shanghai and Shenzhen that is quoted and settled in foreign currency, created to let overseas investors buy domestic companies when the A class was restricted to residents; the segment is small and thinly traded now that other access channels exist. In general corporate usage it names a second class of common stock carrying different voting or dividend rights from the first, and in mutual funds it once described a class sold without an initial charge but with a deferred sales charge and higher annual fees.

Baby BondStocks

A debt security issued in a face amount smaller than the customary one thousand dollar institutional denomination, often twenty-five dollars, and usually listed so it can be bought in small quantities through a brokerage account like a share. Issuers use the structure to reach retail buyers directly. The trade-off is liquidity: these issues are small, trade infrequently and can carry wide spreads, and many are subordinated or carry an early redemption option that caps price appreciation. The phrase has also been used for proposals to give every newborn a government-funded savings account.

Bad BankStocksCrypto

A separate entity created to take over impaired loans and other distressed holdings from a bank, so the remaining institution can operate with a clean balance sheet and regain access to funding. The transfer price determines who absorbs the loss: too high and the receiving vehicle, often publicly supported, takes it, too low and the selling bank crystallizes a capital shortfall. The vehicle then works the assets out over years, restructuring or selling them without the pressure of a going concern's daily funding needs. Governments have used the structure repeatedly during banking crises.

Balloon LoanStocks

A loan whose scheduled payments do not repay the principal by the end of the term, leaving a large single amount due at maturity. Payments are often calculated on a longer amortization schedule than the actual term, so a loan amortized over thirty years but maturing in seven leaves most of the balance outstanding on that date. The structure keeps monthly payments low, and the borrower must refinance, sell the asset or pay the sum in cash when it arrives. Refinancing depends on credit conditions and the asset's value at that future date, neither of which is known in advance.

BANDStocksFutures

A range within which an authority allows a price to move before it intervenes, most commonly a currency's permitted deviation from a central rate against another currency or a basket. The central bank buys or sells reserves at the edges to hold the rate inside, so the wider the range, the more independence domestic monetary policy retains and the less reserve intervention is needed. Narrow ranges invite speculative attack when the market doubts the authority's reserves or resolve. The same idea appears in interest rate corridors, where deposit and lending facility rates bound the market rate.

Bank of JapanStocks

Japan's central bank, responsible for issuing the yen, conducting monetary policy and acting as lender of last resort to the domestic banking system. Its policy board sets the short-term rate target and decides on asset purchases, and it has pioneered several unconventional tools, including large-scale government bond buying, purchases of equity index funds, a negative policy rate, and yield curve control, which targets a level for a longer-dated government bond yield rather than only the overnight rate. Its decisions move the yen and global bond markets because Japanese investors are large holders of foreign debt.

Bank ReferenceStocks

A statement a bank provides, at its customer's request and with their consent, confirming how long the relationship has run and giving a general view of whether the customer's balances and conduct would support a proposed transaction. Suppliers extending trade credit, landlords and counterparties in cross-border deals ask for one when they cannot obtain a credit report. The language is deliberately guarded, since the bank does not guarantee payment and limits its own liability, so the reference confirms the relationship's existence and standing rather than certifying that any specific obligation will be met.

BANKERStocksCrypto

A person or institution whose business is taking deposits, extending credit and providing payment services, or in market usage a professional employed in that industry. The commercial side lends depositors' money at a higher rate than it pays them, earning the spread while managing credit and liquidity risk. The investment side does not take deposits at all, instead advising on capital raising and mergers, underwriting new issues and trading securities. The distinction matters because the two activities are regulated differently and have at times been legally separated.

BANKNOTEFuturesStocks

A paper or polymer instrument issued by a central bank or authorized issuer that circulates as legal tender at its stated face value. Modern notes are fiat money: their value rests on the issuer's standing and legal status rather than on convertibility into gold or any other commodity, and the promise printed on older notes to pay the bearer is a historical survival. Issuers embed security features such as watermarks, security threads, colour-shifting inks and microprinting to make counterfeiting difficult, and they withdraw and replace worn notes and older series over time.

Barbell PortfolioStocks

A bond allocation concentrated at two ends of the maturity spectrum, very short and very long, with little in between. Short holdings mature quickly and can be reinvested if rates rise, while long holdings lock in yield and add duration. Compared with a bullet portfolio of similar average duration built from intermediate maturities, this shape has more convexity, so it gains slightly more when yields fall than it loses when they rise by the same amount, and it performs differently when the curve steepens or flattens rather than shifting in parallel. The trade-off is more frequent reinvestment and higher turnover.

Basis SwapOptionsStocks

An interest rate swap in which both legs float, each referencing a different index or tenor, so the exchange is between two variable rates rather than fixed against floating. Examples include one overnight benchmark against another, a three-month tenor against a one-month tenor of the same benchmark, or a rate in one currency against a rate in another. It is used to manage the mismatch that arises when an institution's assets reprice off one index and its funding off a different one. The spread quoted on one leg prices the market's view of how the two indices will diverge.

Basle AccordStocks

An older spelling of the Basel Accords, the international bank capital standards agreed through the Basel Committee on Banking Supervision, which is hosted by the Bank for International Settlements in Switzerland. The agreements are not law in themselves: national supervisors choose whether and how to implement them, so the detail differs between jurisdictions. Successive versions have moved from a simple risk-weighting of assets toward supervisory review, market disclosure, better-quality capital, leverage limits and liquidity standards. Older documents and textbooks use this spelling for the same framework.

Beating the GunStocks

Market slang for acting ahead of a scheduled or permitted moment: entering a position before an announcement is released, or in a securities offering, generating interest in an issue before the filing allows it. That second sense overlaps with what regulators call gun-jumping, where offers or promotional activity precede the permitted stage of a registered offering and can force a cooling-off period. Trading ahead of information that is material and non-public raises a separate and more serious problem, since acting on it in breach of a duty is insider dealing rather than merely being early.

Below the LineStocksCrypto

Describing items reported after a designated subtotal on a financial statement, so they are excluded from the measure that subtotal represents. In an income statement the line is usually operating profit, and items placed beneath it, such as discontinued operations, certain unusual charges or tax effects, are treated as separate from the ongoing business. In government accounting the phrase separates financing transactions from the revenue and spending that determine the deficit. Because what sits above or below the line is a presentation choice within accounting rules, analysts check whether recurring costs have been moved below it.

Big BangStocksCrypto

The deregulation of the London Stock Exchange that took effect in October 1986, abolishing fixed minimum commissions, ending the separation between brokers who acted for clients and jobbers who made markets, allowing outside and foreign firms to own member firms, and replacing floor trading with screen-based quotation. The changes brought large international banks into London and consolidated many partnerships into their balance sheets, reshaping the market's structure within a few years. The phrase has since been reused for other sudden regulatory liberalizations, notably Japanese financial reforms in the late 1990s.

Black MoneyStocks

Income earned or held outside the official record so that tax due on it is not paid, whether the underlying activity is legal or not. It circulates in cash, unreported foreign accounts, undervalued property transactions and shell company structures. Governments target it with currency measures, mandatory identification for large transactions, disclosure schemes offering reduced penalties for voluntary declaration, and cross-border information exchange between tax authorities. The phrase is used most widely in India, where estimates of its scale vary enormously precisely because the activity is unrecorded and any figure is an inference rather than a measurement.

Book Entry SecurityStocks

A security recorded only as an electronic entry in a register rather than represented by a printed certificate. Ownership passes when the register is updated, usually through a central securities depository holding the position for participating brokers and banks, who in turn record their customers' holdings. Removing physical documents eliminates loss, theft and the delay of moving paper, which is what made shorter settlement cycles possible. Most government debt, listed equities and fund units are now issued this way, and investors hold them through their broker's account rather than in their own name on the issuer's register.

BORROWERStocks

The party that receives money or securities under a credit agreement and is obliged to return them on agreed terms, with interest or a fee. Their identity determines the credit risk the lender takes, which is assessed from income or cash flow, existing obligations, repayment history and any collateral pledged. The obligations, including payment dates, covenants, reporting and what constitutes default, are set out in the loan documents. In securities lending the same word describes the party that takes a stock on loan, typically to settle a short sale, and posts collateral against it.

Boston OptionOptionsStocks

An option in which the premium is paid at expiry rather than at the outset, also described as a deferred premium option. The buyer therefore commits no cash on day one, which suits a hedger who wants protection without an immediate outlay. Because the payment is deferred, the amount charged is higher than the ordinary premium by the time value of money over the life of the contract, and unlike a standard option the buyer owes it whether or not the contract ends with value. That obligation makes it a credit exposure for the seller, not merely a market position.

Break ForwardOptionsStocks

A currency contract that behaves as a forward but lets the holder abandon it at a predetermined break rate if the market moves in their favour, giving unlimited participation beyond that point. No premium is paid at the outset; the cost is embedded by setting the contracted forward rate less favourably than the market forward. Economically it is a forward combined with an option to reverse, which makes it equivalent to a deferred premium option. Corporate treasurers used the structure to obtain option-like protection without a cash premium or, historically, without reporting an option position.

Broken DateStocks

A value or maturity date in a foreign exchange or money market transaction that does not fall on one of the standard periods such as one week, one month or three months. Dealers quote standard tenors continuously, so a trade settling on an intervening date must be priced by interpolating between the two neighbouring quotes and usually carries a slightly wider spread for the extra work and hedging awkwardness. Corporate hedgers need them because commercial cash flows arrive on invoice dates rather than on market convention dates. Also called an odd date.

Broker LoanOptionsStocks

Short-term borrowing by a broker-dealer from a bank, secured by securities held in the firm's own or its customers' margin accounts, used mainly to fund the credit the firm extends to margin clients. The rate charged, historically published as the broker call rate, is the base from which brokers set the interest they charge those clients, adding a spread that usually narrows as the balance grows. The loan is typically callable on demand, which is why the funding is sensitive to conditions: banks can reduce it precisely when collateral values are falling.

BUY-BACKStocks

A company purchasing its own shares from the market, which cancels them or holds them in treasury and so reduces the count outstanding. Each remaining share then represents a larger slice of the same earnings, raising earnings per share even when total profit is unchanged, and the cash returned to selling holders is an alternative to a dividend with different tax timing for the recipient. Execution can be open-market purchases over months or a tender offer at a fixed price. The value created depends on the price paid relative to the shares' worth, and repurchases are often heaviest when prices are high.

Buying the DipsStocks

Adding to a position after a price decline, on the reasoning that the fall is temporary within a continuing uptrend and offers a better entry than the prior level. The approach works while the underlying trend holds and fails when a decline turns out to be the start of a sustained fall, since averaging into a deteriorating position increases the amount exposed exactly as the case weakens. What separates the two cases is whether the reason for holding the asset still applies, which price alone does not answer. Position sizing and a predefined exit are how practitioners bound the outcome.

Basel 1 and 2Stocks

The first two international bank capital frameworks agreed through the Basel Committee on Banking Supervision. The 1988 version introduced a minimum ratio of capital to assets weighted into a few broad risk buckets, a deliberately simple design that treated all corporate lending alike and could be gamed by shifting toward exposures the buckets underweighted. The 2004 revision replaced that with three pillars: risk-sensitive capital requirements allowing banks to use internal models, supervisory review of each bank's own assessment, and market discipline through disclosure. Weaknesses exposed in the 2008 crisis, particularly in capital quality and liquidity, led to the third framework.

BearStocks

A participant who expects prices to fall, and by extension the label for pessimistic positioning or conditions. Someone holding that view can simply stay in cash, sell holdings, short sell, or buy put options, and the expression is used for a market, a sector or a single security. The traditional contrast is with a bull expecting prices to rise. One account of the origin points to sellers who sold skins before catching the animal. The term describes an opinion about direction, not a prediction that has been validated by anything.

Banker's AcceptanceOptionsStocks

A banker's acceptance is a time draft drawn on a bank and stamped accepted by it, which converts the bank's credit standing into an unconditional promise to pay the face amount on a stated future date. It arises in trade finance, where a seller wants certainty of payment from a buyer it does not know. Once accepted, the instrument trades in the money market at a discount to face value, and the holder receives the full amount at maturity.

Basel IStocks

Basel I is the 1988 capital accord agreed by the Basel Committee on Banking Supervision, the first international standard setting minimum bank capital against risk. It sorted assets into a small number of risk weight buckets, largely by borrower type, and required capital of at least eight per cent of the weighted total, split between core and supplementary tiers. Its coarse weights encouraged banks to hold the riskiest exposure within each bucket, a weakness later frameworks were designed to address.

Benjamin GrahamStocks

Benjamin Graham was an investor, teacher and author whose work established security analysis as a discipline. With David Dodd he wrote Security Analysis in 1934, and he wrote The Intelligent Investor in 1949. He argued that a security is worth buying only at a discount to a conservatively estimated intrinsic value, a cushion he called the margin of safety, and used the figure of Mr Market to describe daily quotations as an offer to transact rather than a verdict on value. He taught at Columbia Business School.

Black TuesdayStocksCrypto

Black Tuesday is 29 October 1929, the day of heaviest selling in the crash that ended the 1920s bull market on the New York Stock Exchange. Record volume overwhelmed the ticker and the exchange's clerical capacity, margin calls forced liquidation of positions bought with borrowed money, and prices fell far enough that the support buying attempted in the preceding week failed. It follows Black Thursday and Black Monday in the same sequence, and the market kept declining for years afterward.

Bombay Stock ExchangeStocks

The Bombay Stock Exchange, now BSE Limited, is a securities exchange in Mumbai founded in 1875 and the oldest in Asia. It lists a large number of Indian companies, trades equities, derivatives, currency and debt instruments electronically, and publishes the SENSEX, a free-float capitalization-weighted index of large Indian companies that serves as the country's best-known market benchmark. It is regulated by the Securities and Exchange Board of India and has itself demutualized into a listed company.

Bond ValuationStocks

Bond valuation prices a bond as the present value of the cash flows it promises: each coupon discounted at the rate appropriate to its date, plus the face amount discounted from maturity. Using a single yield for every cash flow produces the familiar price and yield relationship, while discounting each payment at its own zero-coupon rate is more precise and prices the bond off the whole curve. Bonds with embedded calls, puts or conversion rights need the option value modeled separately.

Bull TrapStocksCrypto

A bull trap is a price move above a resistance level or chart pattern that draws in buyers expecting a breakout, then reverses back below the level, leaving those positions at a loss. It typically shows weak volume on the break and rapid rejection afterward. Traders who use breakouts try to filter it by waiting for a close beyond the level, confirmation on a second timeframe, or a retest that holds, though no filter removes the pattern entirely. Full guide →

Burn RateStocks

Burn rate is the pace at which a company consumes cash reserves, usually stated per month. Gross burn is total cash operating outflow; net burn subtracts cash receipts, so it measures the actual monthly decline in the balance. Dividing cash on hand by net burn gives runway, the number of months before the balance reaches zero at the current pace. It is the central metric for a business not yet generating enough revenue to fund itself, because it sets the fundraising deadline.

Buy Stop OrderStocksCrypto

A buy stop order is an instruction to buy that stays inactive until the market trades at or above a stop price set above the current price, at which point it becomes a live market or limit order. Two uses dominate: entering a long position only once a price level has been exceeded, and closing a short position to limit loss if the price rises. The execution price is not guaranteed, since the order competes for whatever liquidity exists once triggered.

Back Door ListingStocks

A back door listing is the route by which a private company obtains a stock exchange quotation by combining with an already listed company instead of running its own initial public offering. The private business is acquired by the listed shell in exchange for a controlling block of new shares, so its owners end up controlling the listed entity, after which the name and business are changed. It is faster and cheaper than an offering but raises no new capital by itself, and exchanges apply reverse takeover rules requiring listing-standard disclosure.

Back LoadStocks

A back load is a sales charge taken when fund shares are sold rather than when they are bought. The usual form is a contingent deferred sales charge, which starts at a stated percentage and steps down each year the shares are held until it reaches zero. Because the charge applies to redemption proceeds, the whole of an investor's payment goes to work at purchase, but selling early is penalized. Back-load share classes normally carry higher annual distribution fees than front-load classes to compensate the distributor.

Back-to-Back SwapStocks

A back-to-back swap is a pair of offsetting swap contracts a dealer enters so that the market risk of one is neutralized by the other. A bank agreeing to pay fixed and receive floating with a customer immediately does the reverse with another counterparty, keeping only the difference between the two rates as its margin. Market risk nets to close to zero, but credit exposure to both counterparties remains and requires collateral or capital, and the two legs can still differ in payment dates and day-count conventions.

Bad Debt ProvisionStocks

A bad debt provision is an amount charged against profit to recognize that some receivables will never be collected, before any specific account is identified as uncollectible. It creates a contra-asset allowance reducing receivables to the amount management expects to recover. Estimates draw on historical loss rates, the aging profile of the receivable book, and current expectations about the economy. When a specific balance is finally written off it is charged against the allowance rather than against profit, so the earnings hit was already taken when the provision was made.

Bank ReleaseStocks

A bank release is the document by which a bank financing an import hands over the shipping documents, and therefore control of the goods, to the importer. In documentary trade finance the bank holds the bill of lading as security, so the importer cannot claim the cargo until the bank releases it, normally after payment or acceptance of the draft. Where documents are released against a trust receipt instead, the importer takes the goods and holds them and their proceeds on trust for the bank until settlement.

Banker's Acceptance (BA) RateStocks

The banker's acceptance rate is the yield at which banker's acceptances trade in the money market. Acceptances are sold at a discount to face value, so the rate is quoted on a discount basis and converted to a bond-equivalent yield for comparison with other instruments. It reflects the credit of the accepting bank rather than that of the underlying commercial transaction, and it normally sits close to other short-term bank funding rates. In Canada the equivalent rate served for many years as the reference for floating-rate corporate loans.

Bankruptcy OrderStocks

A bankruptcy order is a court order declaring an individual bankrupt and transferring control of their assets to a trustee or official receiver for distribution among creditors. It follows a petition presented by the debtor or by a creditor and, once made, halts most individual enforcement action while imposing restrictions on the bankrupt, such as limits on obtaining credit or acting as a company director. After a set period the bankrupt is discharged and remaining qualifying debts are written off, while the trustee continues realizing assets.

Bankruptcy PetitionStocks

A bankruptcy petition is the formal application that starts an insolvency case in court. A voluntary petition is filed by the debtor; an involuntary petition is filed by creditors who meet statutory tests for the number and amount of claims. Filing generally triggers an automatic stay in the United States, halting collection efforts, foreclosure and lawsuits, which freezes the position while the case proceeds. The petition names the chapter or procedure sought and must be supported by schedules of assets, liabilities, income and expenses.

Barrier OptionOptionsStocks

A barrier option is an option whose existence depends on whether the underlying price touches a specified level during the contract's life. Knock-out versions cease to exist if the barrier is reached; knock-in versions do not become live until it is. Each comes in up and down variants, depending on whether the barrier sits above or below the starting price. Because the contract can be extinguished, a barrier option costs less than the equivalent standard option, and a knock-in plus the matching knock-out equals a standard option.

Basel Market Risk AmendmentStocksCrypto

The Market Risk Amendment is the 1996 addition to the original Basel Capital Accord that extended bank capital requirements from credit risk to the market risk carried in trading positions. It required capital against interest rate, equity, foreign exchange and commodity exposures in the trading book, and it introduced the internal models approach, letting a bank use its own value-at-risk model to size the requirement subject to supervisory approval and back-testing. That decision made value-at-risk the industry standard measure and shaped trading book capital rules for two decades.

Bells and WhistlesOptionsStocks

Bells and whistles is market slang for the optional features added to a security or derivative beyond its plain structure. On a bond these include call and put provisions, step-up coupons, conversion rights, attached warrants, or a coupon linked to an index. Each feature is an embedded option transferring value between issuer and holder, so it changes the fair yield: features favoring the issuer require a higher coupon, and features favoring the holder allow a lower one. Complexity also reduces liquidity, since fewer buyers will price the structure.

Bermuda TransformerStocks

A Bermuda transformer is a specially licensed insurance or reinsurance company, usually domiciled in Bermuda, that converts a derivative contract into an insurance contract or the reverse. An investor permitted to write insurance but not derivatives can sell protection through the transformer, which enters the credit default swap with the bank and issues a matching insurance policy to the investor. The structure exists because regulatory, accounting and tax treatment differ between the two contract types even when the economics are nearly identical, and it adds counterparty risk on the transformer.

Bill FutureStocks

A bill future is an exchange-traded futures contract on a short-term government bill, most commonly a Treasury bill. It is quoted on an index basis of 100 minus the annualized discount rate, so the price rises as the implied yield falls, and it settles against a specified bill issue or against a cash settlement rate. Traders use it to hedge or express views on short-term interest rates. It has largely been displaced by futures on overnight and term reference rates, which match how modern short-term funding is actually priced.

Bill of LadingStocks

A bill of lading is the document a carrier issues to a shipper acknowledging goods received for transport. It performs three jobs at once: a receipt for the cargo, evidence of the contract of carriage, and, when made out to order, a document of title whose holder can claim the goods at destination. That last function is what makes it central to trade finance, because a bank can hold the bill as security for a letter of credit and control the goods until the importer pays.

Bills ReceivableStocks

Bills receivable are bills of exchange and promissory notes a business holds on which other parties owe it money at a future date. They sit on the balance sheet as a current asset, separate from ordinary trade receivables, because they are negotiable instruments with a definite maturity and a signed promise to pay. The holder can wait until maturity, endorse the bill to settle its own debt, or discount it with a bank for cash now at a discount to face value while remaining liable if the acceptor defaults.

Binary-Barrier OptionOptionsStocks

A binary-barrier option combines a fixed payoff with a trigger level: it pays a set cash amount or asset value only if the underlying touches, or fails to touch, a specified barrier. One-touch contracts pay when the barrier is reached; no-touch contracts pay only if it never is. Payment can be made immediately on the touch or deferred to expiry, which changes the discounting. Because the payoff jumps rather than varying smoothly with price, hedging near the barrier requires large and rapidly changing positions in the underlying.

BinderOptionsStocks

A binder is a temporary written agreement that puts insurance cover in force before the formal policy is issued. It names the insured, the property or liability covered, the limits and the term, and it binds the insurer on those terms while underwriting is completed. Cover runs until the policy is delivered or until a stated expiry, and either party can usually cancel with notice. In real estate the same word describes a preliminary agreement and deposit that reserves a property pending a full contract of sale.

Blank Check PreferredStocks

Blank check preferred is authorized but unissued preferred stock whose dividend rate, voting rights, conversion terms and liquidation preference the board may set at the time of issue without returning to shareholders for approval. It gives a company speed in raising capital or structuring an acquisition. It is also a takeover defense, because the board can place a block carrying supervoting or conversion rights with a friendly holder, and most poison pills are implemented through it. Governance analysts treat a large unallocated authorization as a negative.

Blind BrokeringStocksCrypto

Blind brokering is an arrangement in which an interdealer broker matches two counterparties without revealing their identities to each other, at least until the trade is agreed. It is used in wholesale bond, repo and foreign exchange markets so that a dealer's intention to buy or sell in size does not reveal its position to competitors. Anonymity requires a way to handle credit: either the broker steps in as central counterparty, or a pre-approved credit screen decides which participants are permitted to match with which.

Blind TrustOptionsStocks

A blind trust is an arrangement in which an independent trustee holds and manages assets with full discretion and no communication to the beneficiary about what is held or traded. Because the beneficiary does not know the current holdings, they cannot make official decisions that favor their own portfolio, which is why public officials use the structure to address conflict of interest rules. It only works if the original assets are sold and reinvested; a trust that simply holds a known concentrated stake is not genuinely blind.

Blue Sky LawsStocks

Blue sky laws are state-level securities statutes in the United States requiring registration of securities offerings and licensing of brokers within the state, and giving state regulators antifraud authority. They predate federal securities law and take their name from a court description of speculative schemes backed by nothing more than so many feet of blue sky. Federal law now pre-empts state registration for covered securities such as exchange-listed stock and certain private placements, but state antifraud powers and broker licensing requirements remain in force.

Board of DirectorsStocks

A board of directors is the body elected by shareholders to oversee a company on their behalf. It hires and can remove the chief executive, approves strategy, major transactions and capital allocation including dividends, and signs off on financial reporting. Directors owe fiduciary duties of care and loyalty to the company. Listing rules require a majority of independent directors and independent audit, compensation and nominating committees. The board does not run day-to-day operations; it monitors those who do and answers to shareholders at the annual meeting.

Bond Anticipation NoteStocks

A bond anticipation note is a short-term municipal borrowing issued to fund a project while a long-term bond issue is being arranged, and repaid from the proceeds of that bond issue. It lets construction begin without waiting for permanent financing and can let an issuer avoid locking in long-term rates during an unfavorable market. The exposure is refinancing risk: if the bond issue cannot be sold on acceptable terms when the note matures, the issuer must find another source or roll the note at whatever rate is then available.

Bond CrowdStocks

The bond crowd was the group of New York Stock Exchange members who traded listed corporate bonds in a separate area of the floor, apart from the stock crowd. Orders in actively traded issues were handled in the free crowd, while less active issues sat in a cabinet system where orders were filed and matched, which gave rise to the term cabinet crowd. Electronic systems and the migration of corporate bond trading to dealer markets and reported over-the-counter trading replaced the arrangement entirely.

BordereauStocks

A bordereau is a periodic schedule a ceding insurer or managing agent sends to a reinsurer listing the individual risks written, the premiums due, and the losses paid or outstanding. A premium bordereau supports the amount the reinsurer is owed; a loss bordereau supports what it must pay. Under a treaty the reinsurer accepts business automatically, so the bordereau is frequently its only view of what it has taken on, which makes the completeness and timeliness of the report a central control in delegated underwriting.

Bretton Woods ConferenceStocks

The Bretton Woods Conference was the 1944 meeting of delegates from forty-four allied nations at Bretton Woods, New Hampshire, that designed the postwar international monetary order. It produced the agreements creating the International Monetary Fund, to provide short-term balance of payments support, and the International Bank for Reconstruction and Development, now part of the World Bank. It also settled on a system of exchange rates fixed to the United States dollar, which was in turn convertible into gold at a stated official price.

Bretton Woods SystemFuturesStocks

The Bretton Woods system was the international monetary arrangement running from the late 1940s until the early 1970s, under which member countries fixed their currencies to the United States dollar within a narrow band while the dollar was convertible into gold at a fixed official price. The International Monetary Fund lent to countries facing temporary payments deficits, and changing a country's par value required consultation. The system ended when the United States suspended gold convertibility in 1971, after which the major currencies floated.

Broker Loan RateStocksCrypto

The broker loan rate, also called the call money rate, is the interest rate banks charge brokerage firms on short-term loans secured by securities in the brokers' possession. Brokers borrow at this rate to finance customer margin accounts and lend on to customers at a spread above it, which is why the rate is the base for a broker's published margin interest schedule. The loans are callable on demand, so the rate moves with short-term money market conditions and with the value of the pledged collateral.

BunchingStocksCrypto

Bunching is the practice of combining several client orders in the same security into one larger order for execution, then allocating the fills back to individual accounts. It can lower per-share costs and give small accounts the same execution price as large ones, since all participants receive the average price of the block. Rules require the allocation method to be set before the order is placed and applied fairly, so a manager cannot assign the good fills to favored accounts afterward. In tape reading the word also describes a cluster of trades printing together.

Bust-Up TakeoverStocks

A bust-up takeover is an acquisition in which the buyer intends to sell off major divisions or assets of the target soon after closing, using the proceeds to repay the debt raised to fund the purchase. It works when a conglomerate's parts are worth more separately than the market values the whole, a gap often called the conglomerate discount. Leveraged buyout firms used the structure extensively in the 1980s. The approach depends on finding willing buyers for the pieces at the assumed prices, which is where the risk concentrates.

Buy MinusStocksCrypto

Buy minus is an order instruction to buy only at a price below the last trade, so the order can execute on a downtick or on a zero-minus tick where the most recent price change was downward. Traders use it to avoid paying up into a rising market and to reduce the market impact of a large purchase, accepting that the order may never fill if the price keeps climbing. The mirror instruction on the sell side is sell plus, which requires an uptick before execution.

Buyers' CreditStocks

Buyers' credit is a loan a bank makes directly to an overseas buyer so that the buyer can pay an exporter in cash on delivery. The exporter is paid immediately and takes no credit risk on the buyer, while the buyer repays the bank over an extended term. Export credit agencies commonly guarantee or insure a large share of the loan, which lets the lending bank extend longer tenors to weaker sovereign or corporate borrowers than it otherwise would. It contrasts with supplier credit, where the exporter itself grants payment terms.

Buying ForwardOptionsStocks

Buying forward means agreeing today to purchase an asset at a set price for delivery on a future date, without paying now. The contract fixes the price, so the buyer is protected against a rise and gives up the benefit of a fall. The forward price is normally the current spot price adjusted for the cost of carry: financing cost and storage, less any income the asset yields before delivery. Because a forward is bilateral rather than exchange traded, it carries counterparty risk unless collateral is posted.

Basel AccordStocks

The Basel Accords are the international bank capital standards agreed by the Basel Committee on Banking Supervision at the Bank for International Settlements. The first accord introduced a minimum ratio of capital to risk-weighted assets. Later versions added capital for market risk, refined risk weighting through internal models and standardized approaches, then added capital buffers, a leverage ratio and liquidity standards. The accords are not law in themselves: each jurisdiction implements them through its own rules, so timing and detail differ between countries.

Basis pointStocks

A basis point is one hundredth of one percentage point, so one hundred basis points equal one percent. Rates and spreads are quoted this way because it removes the ambiguity in a phrase like a one percent increase, which could mean a move from four percent to five, or from four to four point zero four. Bond yields, swap spreads, central bank rate decisions and fund expense ratios are all conventionally expressed in basis points, and traders shorten the term to bps or bips in speech.

Basket Credit Default SwapStocks

A basket credit default swap is a credit derivative referencing several borrowers at once, where the payout is triggered by defaults within the basket rather than by a single name. In an nth-to-default structure the protection seller pays only when the nth default occurs and the contract then terminates, which is why a first-to-default basket is the most expensive form. Pricing depends heavily on default correlation between the reference entities: higher correlation makes a first default less likely but makes multiple defaults more likely.

Bootstrap MethodStocks

The bootstrap method builds a zero-coupon yield curve from the prices of coupon-paying bonds, one maturity at a time. It starts with the shortest instrument, which has a single cash flow and therefore yields a spot rate directly, then uses that rate to discount the near coupons of the next bond, leaving one unknown to solve for. Repeating outward produces a full set of discount factors consistent with observed prices. In statistics the same word means something different: resampling a data set repeatedly to estimate the distribution of a statistic.

BankStocks

A licensed institution that accepts deposits repayable on demand or at short notice and uses them to make loans and hold securities. The core business is maturity and liquidity transformation: funding long-dated illiquid assets with short-dated liabilities, earning the spread and managing the chance that depositors withdraw together. Because that structure is fragile, banks operate under capital, liquidity and reserve requirements, supervision, deposit insurance and access to a central bank lender of last resort.

Bond ReconstitutionStocks

Reassembling the separated pieces of a stripped government bond back into the original whole security. A dealer collects the principal component and every coupon component with matching payment dates and delivers them to the depository, which cancels the strips and reissues the coupon bond. It is the reverse of stripping, and dealers do it when the strips trade cheaper than the intact bond, which keeps the prices of the two forms in line.

Book-to-Market EffectStocks

The empirical finding that stocks with a high ratio of book value to market value have historically earned higher average returns than stocks with a low ratio. The ratio is book equity divided by market capitalization, so high readings identify companies priced cheaply relative to accounting net worth. The pattern is one of the anomalies that motivated multifactor asset pricing models, and researchers still dispute whether it compensates a risk exposure or reflects mispricing. Past patterns need not persist.

BAT StocksStocks

Market shorthand for the three large Chinese internet companies Baidu, Alibaba and Tencent, grouped together the way leading American technology firms are bundled under their own acronyms. The label is a convenience for describing exposure to Chinese consumer internet platforms across search, commerce and messaging. Grouping distinct companies under one label obscures differences in their business models, regulatory exposure and the share structures through which foreign investors hold them.

BailoutStocks

Financial support given to a failing company, bank or government by an outside party, usually the state, to prevent collapse and its knock-on effects. It can take the form of loans, guarantees, asset purchases or an injection of capital in exchange for equity, and it normally comes with conditions on management, dividends and pay. The central objection is moral hazard: shielding creditors from losses encourages the same risk-taking that caused the problem.

Bank GuaranteeStocks

An undertaking by a bank to pay a beneficiary a stated amount if the bank's customer fails to perform a contractual obligation. The beneficiary can claim against the bank instead of pursuing the customer, which is why guarantees support construction contracts, trade payments, leases and customs obligations. The bank charges a fee and takes security or a credit line from the customer, and it pays against the documents specified rather than judging the underlying dispute.

Bank Account RegisterStocks

A running record the account holder keeps of deposits, withdrawals, checks, card payments and fees, with a balance carried forward after each entry. Maintaining it independently of the bank's statement allows reconciliation: comparing the two identifies items that have not cleared, duplicate charges and transactions the holder did not authorize. It also shows the true available balance before pending items post, which the bank's displayed balance may not reflect.

BankruptcyStocks

A legal process for resolving the obligations of a debtor who cannot pay them, conducted under court supervision. Filing generally halts individual collection efforts so claims are dealt with collectively, and the outcome is either liquidation, where assets are sold and proceeds distributed to creditors in order of priority, or reorganization, where the debtor keeps operating under a plan that binds creditors once approved. Which procedures are available depends on the jurisdiction and the type of debtor.

Bankruptcy TrusteeStocks

An officer appointed to administer a bankruptcy estate on behalf of creditors. The trustee takes control of the debtor's non-exempt property, investigates its financial affairs, can challenge transfers made before the filing that unfairly favored one creditor, sells assets and distributes proceeds according to the statutory order of priority. In a reorganization the debtor often stays in possession and a trustee is appointed only for cause, such as fraud or gross mismanagement.

BarbellStocks

A bond portfolio concentrated in very short and very long maturities with little held in between. Its duration can be matched to that of a portfolio of intermediate bonds, but the cash flows are spread differently, so the two respond differently when the curve steepens or flattens rather than shifting in parallel. The short leg matures continuously to provide liquidity and reinvestment, while the long leg supplies yield and interest rate sensitivity.

Bear HugStocks

An unsolicited acquisition proposal made public at a premium large enough that the target's board has difficulty refusing it without upsetting shareholders. The bidder writes to the board and releases the letter, shifting pressure from the boardroom to the shareholder register. It stops short of a hostile tender offer or proxy fight but sets one up, and directors must still weigh it against their duties rather than accepting automatically.

Black MarketStocks

Trade that takes place outside legal channels, either in goods and services that are prohibited or in legal ones sold while evading taxes, price controls, licensing or currency rules. Prices carry a premium for the risk sellers take and for restricted supply, and there is no recourse to courts, warranties or safety regulation. A persistent black market usually signals that official prices or exchange rates are held away from market-clearing levels.

Black MondayStocksCrypto

The stock market crash of 19 October 1987, when the Dow Jones Industrial Average fell about twenty-two percent in a single session and markets around the world dropped sharply in the same week. Portfolio insurance programs selling futures into a falling market, order handling systems overwhelmed by volume, and a breakdown in the link between futures and cash prices amplified the decline. The episode led to circuit breakers and coordinated trading halts.

BloombergStocks

A financial data, analytics, messaging and news company whose terminal service is a standard workstation for traders, portfolio managers and analysts. Subscribers get real-time and historical prices, company and economic data, pricing models, trade execution links and a closed messaging network that functions as a market-wide communication channel. The company charges an annual license per user, and its news division supplies reporting both to the terminal and to public outlets.

BlotterStocksCrypto

A chronological record of the trades a desk or firm executed over a session, listing security, side, quantity, price, time, venue, counterparty and the account traded for. It is the working document used to check fills against orders, monitor positions during the day, and reconcile with the back office and the clearing broker at the close. Retention of trade records in this form is required by broker-dealer rules in most jurisdictions.

Bond QuoteStocks

The convention by which a bond's price is expressed, normally as a percentage of face value rather than in currency, so a quote of ninety-eight means ninety-eight percent of par. United States Treasuries are quoted in points and thirty-seconds of a point, while corporate and municipal bonds are quoted in decimals or by yield. The quoted price is usually clean, meaning interest accrued since the last coupon is added separately in the settlement amount.

Borrowing BaseStocksCrypto

The maximum a lender will advance under an asset-based facility, recalculated regularly by applying advance rates to eligible collateral. A typical formula takes a high percentage of eligible receivables plus a lower percentage of eligible inventory, after excluding items such as past-due invoices, related-party balances and slow-moving stock. The borrower reports the calculation on a schedule, and if the base falls below the amount drawn, the excess must be repaid.

Both-to-Blame Collision ClauseStocks

A clause in marine bills of lading and cargo policies dealing with a collision where both vessels are at fault. Under some legal systems the cargo owner recovers from the other ship, which then passes part of that cost back to the carrying ship despite the contractual protections the carrier holds against its own cargo. The clause requires the cargo interest to indemnify the carrier for that recovery, and cargo insurance normally covers the obligation.

Brand LoyaltyStocks

The tendency of customers to keep buying the same brand when substitutes are available at similar prices. It shows up in repeat purchase rates, willingness to pay a premium and resistance to competitor promotions. For a business it lowers the marketing cost of each sale, stabilizes revenue and supports pricing power, which is why analysts treat it as an intangible source of competitive advantage even though it rarely appears on the balance sheet.

Breadth IndicatorStocksCrypto

A measure of how many securities are taking part in a market move, used to judge whether an index advance rests on broad participation or on a few large constituents. Common versions include the advance-decline line, the count of new highs against new lows, the percentage of members above a moving average, and up-volume against down-volume. Divergence, where the index rises while the measure weakens, is read as a caution signal rather than a timing rule.

Bullet RepaymentStocks

A structure in which the entire principal of a loan or bond falls due in a single payment at maturity, with only interest paid during the term. It keeps periodic outgoings low and leaves the full amount outstanding until the end, so the borrower carries refinancing risk concentrated on the maturity date. Lenders price that concentration through covenants, security or a wider spread, and borrowers often stagger maturities across several instruments to spread it.

Business AssetStocks

Property a company uses in its operations to generate revenue, ranging from premises, machinery and vehicles to inventory, receivables, software and intellectual property. The classification matters for tax and accounting: capital items are depreciated or amortized over their useful life rather than expensed at once, and a sale can trigger a gain or loss measured against written down value. Property used partly for private purposes needs an allocation between the two uses.

Business BankingStocks

The set of banking services aimed at companies rather than individuals: operating accounts, payments and collections, payroll, merchant acquiring, overdrafts, term loans, asset finance, trade finance and foreign exchange. Credit decisions rest on financial statements, cash flow and often personal guarantees from owners, and pricing is negotiated rather than posted. Banks segment the field by turnover, handling small businesses with standardized products and larger companies through relationship managers.

Business EconomicsStocks

The application of economic analysis to the decisions a firm actually makes: what to produce, how to price it, whether to expand capacity, whether to make or buy, and how to respond to rivals. It draws on demand estimation, cost and production theory, market structure and game theory, and on capital budgeting for investment choices. The emphasis is on informing managerial choices with data and models rather than describing the economy as a whole.

Business ModelStocks

The description of how a company creates value for customers and captures part of it as profit: what it sells, to whom, through which channels, at what price and cost structure, and which activities and assets it needs to deliver. Two firms in the same industry can run different models, for example selling equipment outright against charging a subscription for its use, and the choice shapes revenue patterns, margins and capital requirements.

Back Up the TruckStocks

Slang for buying a very large quantity of a security in one go, the image being a delivery truck reversing up to load as much as possible. It is used when a buyer regards a price as unusually attractive relative to their own assessment of value. Concentrating a position this way raises the portfolio's dependence on a single outcome, and executing size quickly in a thin market can move the price against the buyer.

BacktestingOptionsStocks

Running a trading or risk model over historical data to see how it would have behaved, using only information that was available at each simulated point in time. Outputs typically include return, drawdown, hit rate and turnover, and for a risk model the count of days on which losses exceeded the forecast. Results overstate what is achievable when the rules were tuned on the same sample, when survivorship is ignored, or when costs and realistic fills are left out.

Balance of Payments(BOP) Stocks

A statistical record of all economic transactions between residents of a country and the rest of the world over a period. It splits into a current account covering trade in goods and services, primary income and transfers, and a capital and financial account covering cross-border asset transactions. In principle the accounts sum to zero, since every payment has a matching entry, and the residual reported is a statistical discrepancy arising from imperfect data collection.

Balance Sheet HedgeStocksCrypto

A currency hedge sized to offset the net monetary assets or liabilities a company holds in a foreign currency, so translation gains and losses on those balances are cancelled by the hedge. The treasurer measures the exposed net position at each reporting date and takes an opposite forward or borrowing position of the same size. It targets reported figures rather than future cash flows, and it must be rebalanced whenever the underlying balances change.

Baltic Exchange Dry Index(Baltic Dry Index) StocksCrypto

A shipping cost benchmark published daily by the Baltic Exchange in London, compiled from assessments submitted by a panel of shipbrokers for chartering vessels that carry dry bulk cargoes such as iron ore, coal and grain along defined routes. Sub-indices cover Capesize, Panamax and Supramax vessel sizes, and the headline figure blends them. Because cargo is booked ahead of production, movements are watched as an indicator of industrial demand and vessel supply.

Bank AccountStocks

A record maintained by a bank of money a customer has deposited and the transactions affecting it. In law the balance is a debt the bank owes the customer rather than cash held on their behalf, which is why deposit insurance schemes exist to protect balances up to a limit set by each jurisdiction. Types differ by access and pricing: current or checking accounts prioritize payments, while savings and term accounts pay interest and may restrict withdrawals.

Bank Advisory CommitteeStocks

A group of commercial bank creditors formed to represent the wider lending group in negotiations with a sovereign or large corporate borrower seeking to restructure its debt. It gathers financial information, agrees a negotiating position, and puts proposed terms to all lenders for approval, so the borrower deals with one body rather than hundreds of institutions. The format was central to sovereign restructurings before bondholders replaced banks as the main creditors.

Bank DraftStocks

A payment instrument drawn by a bank on itself or on another bank, with the funds taken from the purchaser's account when the draft is issued. Because payment is backed by the bank rather than by an individual account holder, it is accepted where a personal check would not be, such as at a property completion. It is not free of risk: drafts can be counterfeited and clearing still takes time, so recipients verify them with the issuing bank.

Bank Holding CompanyStocks

A company that controls one or more banks and is regulated at group level as a result. In the United States it registers with the Federal Reserve, which supervises the parent, sets consolidated capital requirements and must approve acquisitions. The structure lets a group raise debt and equity at the parent, own non-bank subsidiaries within permitted limits and move capital between entities, while the parent is expected to act as a source of strength to its banks.

Bank LineStocks

A credit limit a bank makes available to a corporate customer for short-term borrowing, typically reviewed annually and used to cover working capital swings. It may be committed, in which case the bank is contractually bound to lend and charges a fee on the undrawn amount, or uncommitted, in which case it can be withdrawn. Companies also keep such lines in place as backup liquidity supporting a commercial paper program.

Bankers' Blanket BondStocks

A fidelity insurance policy protecting a financial institution against losses caused by dishonest acts of its own staff, and commonly also against robbery, forgery, counterfeit securities and loss of property in transit. Cover is written for the institution rather than for its customers, and limits are set against the size of the balance sheet and the volume of transactions handled. Regulators and correspondent banks often expect such a bond to be in force.

BankmailStocksCrypto

An agreement in which a bank advising or financing one bidder undertakes not to provide funding to a competing bidder for the same target during a set period. It is intended to limit the pool of financing available to rival offers and so protect the first bidder's position. The arrangement attracts scrutiny where only a small number of banks could realistically fund a deal, since restricting them reduces competition for the target.

Base Weighted Index(Laspeyres index) Stocks

An index whose component weights are fixed using quantities from a chosen base period, so later readings show what the same basket would cost at current prices. This is the Laspeyres construction, and it is the standard approach for many consumer price measures. Holding quantities fixed makes the series easy to interpret, but it tends to overstate the rise in the cost of living because it ignores substitution away from goods whose prices have risen fastest.

Basis PriceStocks

A price stated as a yield rather than as a currency amount, so a bond quoted on a basis of a given percentage is offered at whatever cash price produces that yield to maturity. Quoting in yield terms lets buyers compare issues with different coupons and maturities directly. The convention is used for short-dated and municipal issues, and for odd-lot transactions where a dealer prices from a yield scale rather than from a running quotation.

Basis TradingOptionsStocks

Taking offsetting positions in a cash instrument and the futures contract written on it, in order to profit from a change in the difference between the two prices rather than from the direction of the market. In government bond markets the trade is usually buying the deliverable bond and selling the future, financing the bond in the repo market and earning the gap between carry and the implied futures financing rate. It is normally run with leverage, so a widening basis can force liquidation.

Bear SpreadOptionsStocks

An option strategy built to profit from a fall in the underlying, constructed by taking a position at one strike and an offsetting position at another with the same expiry. The put version buys a higher-strike put and sells a lower-strike put, while the call version sells a lower-strike call and buys a higher-strike one. Both cap the maximum gain and the maximum loss, and the cost or credit at entry is the difference between the two premiums.

Bear SqueezeStocks

A move that forces short sellers to buy back positions at rising prices, whether it results from deliberate action or from a shortage of stock to borrow. Central banks have squeezed speculators shorting a currency by buying it and raising interest rates, and in equities a shrinking borrow or a takeover announcement can do the same. Because covering demand adds to buying pressure, the price can overshoot well beyond what the underlying news would justify.

BearerStocks

The person in physical possession of a negotiable instrument that is payable to whoever presents it, rather than to a named party. Possession alone establishes the right to payment, so handing the document over transfers the claim without registration or endorsement. That feature makes such instruments simple to pass on but impossible to replace if lost or stolen, and it is why many jurisdictions have restricted or abolished securities issued in this form.

Bearer SecurityStocks

A share or bond whose ownership is evidenced solely by possession of the certificate, with no register of holders maintained by the issuer. Coupons attached to the document are detached and presented to claim interest payments. The anonymity that made these instruments popular also made them useful for tax evasion and money laundering, so most jurisdictions have banned new issuance and required existing holdings to be immobilized with a custodian or converted into registered form.

BearishStocks

Describing an expectation that a price, market or economy will fall, or a position structured to benefit if it does. The view is expressed by selling holdings, selling short, buying puts or reducing exposure to cyclical assets. The word also describes chart patterns and indicator readings that a technical analyst reads as pointing lower. It is a statement about direction only, and says nothing about the size or the timing of the move expected.

Beauty ContestStocks

A selection process in which a company, government or fund invites several banks, law firms or asset managers to pitch for a mandate, each presenting its proposed approach, team and fees. The client compares the presentations and awards the work, sometimes splitting roles among more than one bidder. In investment banking the pitch usually includes a valuation and a suggested structure prepared without charge, so the cost of losing is the time invested.

Bed and BreakfastingStocks

A United Kingdom practice of selling shares and buying them back shortly afterwards, so a capital gain or loss is realized for tax purposes while the holding is effectively retained. Share identification rules now match a repurchase made within a set window back to the disposal, which cancels the intended effect, so variants using a spouse's account or an equivalent but different security are used instead. The United States addresses similar behavior through its wash-sale rule.

Below ParStocks

Describing a bond trading at a price lower than its face value, so a buyer pays less than the amount that will be repaid at maturity. It arises when the coupon sits beneath the yield the market now demands for that credit and maturity, or when the issuer's creditworthiness has deteriorated. The discount is recovered as the price converges toward face value, so yield to maturity exceeds the coupon rate. New issues can also be priced this way at launch.

Beneficial InterestStocks

The right to enjoy the benefit of an asset, such as its income, capital growth or use, where legal title is held by someone else, typically a trustee, nominee or custodian. Shares held through a broker are commonly registered in the nominee's name while the client holds the beneficial interest. Disclosure rules require beneficial owners of significant stakes to be identified, because voting power and economic exposure sit with them rather than with the registered holder.

BiasOptionsStocks

A systematic tendency for an estimate, model or process to depart from the true value in the same direction, as opposed to random error that averages out over repeated samples. Statistically, an estimator is biased when its expected value differs from the parameter being estimated. Common sources in finance include survivorship in a fund database, look-ahead in a backtest that uses data not yet published at the time, and selection effects when a sample is not representative.

Bid WhackerStocksCrypto

Slang for a trader who sells by hitting the standing bid rather than posting an offer and waiting, accepting the lower price in exchange for immediate execution. The phrase is often used disparagingly by holders watching a price fall. In market microstructure terms this trader is the liquidity taker on the sell side, and a run of such trades pushes the order book downward and signals urgency in the flow.

Big FigureStocksFutures

The whole-number portion of a foreign exchange quote, which dealers omit when quoting because both sides already know it. If a rate is trading around 1.2750, the big figure is 1.27 and a dealer quotes only the final digits. Traders speak of a move of a big figure to mean a change of one whole unit in that position, and conventions require the complete rate to be confirmed when the trade is booked.

Bilateral FacilityStocks

A loan agreement between a single lender and a single borrower, without a syndicate. It is quicker to negotiate and document than a syndicated deal and keeps the relationship private, which suits smaller amounts and borrowers wanting flexibility. The lender takes the whole exposure, so the size is limited by its own concentration policy. Companies often run several such lines alongside each other rather than arranging one large syndicated facility.

Bills PayableStocks

Amounts a business owes on bills of exchange or promissory notes it has accepted, recorded as a current liability separate from ordinary trade payables. The obligation is evidenced by a negotiable instrument with a fixed maturity date, so the holder can discount or transfer it before then. In bank balance sheets the same heading covers drafts the bank has issued and not yet paid. The mirror item for amounts owed to the business is bills receivable.

Binary Credit OptionStocks

A credit derivative paying a fixed amount if a defined credit event occurs on a reference entity before expiry, and nothing otherwise. Because the payout is agreed at the outset rather than derived from the recovery value of defaulted debt, the buyer avoids the process of establishing what those obligations are worth after default. That removes recovery uncertainty but leaves basis risk, since the fixed sum may be more or less than the loss actually suffered.

Black BoxStocksCrypto

A system whose inputs and outputs can be observed but whose internal workings are hidden or too complex to inspect, used of proprietary trading algorithms, credit scoring engines and machine learning models. The concern for a user is that behavior in conditions absent from the development data cannot be predicted from outside. Supervisors respond by requiring model documentation, validation by an independent team and, in some regimes, an explanation of automated decisions.

Block CrossingStocksCrypto

The matching of a large buy order against a large sell order at a single agreed price, arranged away from the continuous order book so the size is not displayed before execution. Brokers and dedicated crossing venues run these to limit the price impact that showing a big order would cause. Rules govern the reference price and post-trade publication, and delayed reporting is permitted in some markets so the counterparty can hedge the position taken on.

Block VolumeStocksCrypto

The share of trading in a security executed in transactions large enough to meet an exchange or regulator's block size threshold, as distinct from ordinary retail-sized flow. It is tracked as an indication of institutional participation, since blocks are usually negotiated by brokers or matched on a crossing venue rather than worked through the public book. A rising proportion suggests position changes by large holders, though a single block says nothing about direction on its own.

Bond PremiumStocks

The amount by which the price paid for a bond exceeds its face value, arising when the coupon is higher than the yield the market requires for that credit and maturity. The excess is not returned at redemption, so accounting and tax rules amortize it over the remaining life, reducing the interest income recognized each period and writing the carrying value down toward face value. That amortization is why yield to maturity on such a bond sits below its stated coupon rate.

Bonus ShareStocks

An additional share issued free to existing holders in proportion to their holding, funded by capitalizing reserves rather than by raising new money. The number of shares rises and the price per share falls correspondingly, so each holder's percentage stake and the company's total value are unchanged. Issuers use it to bring the share price into a more marketable range and to signal confidence that earnings will support the enlarged share count.

BreakStocks

A sudden, sharp fall in the price of a security or a market, usually on heavy volume and often after a level that had been holding gives way. The word is also used in back offices for a discrepancy found when two sets of records are reconciled, such as a difference between a broker's position and the custodian's. In both senses it marks the point at which something that had been stable stops holding.

Break IssueStocksCrypto

A new issue whose price falls below the offering price once trading begins, so investors who bought in the offering are immediately below water. It indicates the deal was priced above where secondary demand sits, and the underwriting syndicate may buy stock to stabilize the price within the limits regulators allow. A record of broken deals damages an underwriter's ability to place future issues, so pricing is normally set at a discount to expected trading levels.

British Bankers' AssociationStocks

A trade body representing banks operating in the United Kingdom, which lobbied on regulation, published industry guidance and, for many years, compiled and published the London Interbank Offered Rate from submissions made by panel banks. Responsibility for administering that benchmark was moved away from the association after investigations found submissions had been manipulated. The organization merged with other trade bodies in 2017 to form a single industry association.

Bull SpreadOptionsStocks

An option strategy positioned for a rise in the underlying, built from two contracts of the same type and expiry at different strikes. The call version buys the lower strike and sells the higher one for a net cost, while the put version sells the higher strike and buys the lower one for a net credit. Both structures cap the maximum profit and the maximum loss, which is the trade-off for the reduced outlay compared with an outright option.

Bullet LoanStocks

A loan requiring no principal repayment during its term, so the entire amount falls due in a single payment at maturity while interest is paid periodically. Keeping amortization out of the schedule reduces the cash the borrower must find each period, but it concentrates repayment into one date and leaves refinancing risk if credit conditions have tightened by then. Lenders often pair the structure with covenants and a defined exit such as a sale or refinancing.

BullishStocks

Describing an expectation that a price, market or economy will rise, or a position built to gain if it does. The view is expressed by buying assets, adding leverage, buying calls or shifting toward exposures that benefit from growth. The word also labels chart formations and indicator readings that a technical analyst interprets as pointing higher. It conveys direction only, without any claim about how far or how fast a move will occur.

Burning Cost RatioStocks

A reinsurance pricing measure comparing the losses a layer of cover would have paid over a historical period with the premium base for that period, calculated as those losses divided by the subject premium and usually expressed as a percentage. Actuaries adjust the raw loss history for inflation, exposure growth and changes in policy terms before applying it. It is most reliable for working layers hit regularly and least reliable for high excess layers with few historical claims.

Buyers' MarketStocksCrypto

Conditions in which supply exceeds demand, so purchasers can negotiate on price and terms while sellers compete for attention. In housing it shows up as rising inventory, longer time on the market and prices agreed below asking. The same idea applies to any market with excess supply, including corporate credit when investors can insist on tighter covenants. The reverse condition, a sellers' market, sees scarce supply and buyers competing against each other.

Base CorrelationStocks

A parameter used in pricing tranches of a synthetic collateralized debt obligation, defined as the single correlation number that makes a model reproduce the market price of an equity tranche running from zero loss up to a given detachment point. Quoting correlations against these base layers rather than against individual tranches produces a curve that can be interpolated consistently, and it avoids the multiple or missing solutions that arise when each tranche is fitted separately.

Behavioral economics(Behavioural economics) StocksCrypto

A field studying how people actually make economic decisions, drawing on psychology and controlled experiments rather than assuming fully rational, self-interested agents. Documented regularities include loss aversion, where a loss weighs more heavily than an equal gain, present bias in trading off now against later, anchoring on an arbitrary reference point, and the influence of how a choice is framed or defaulted. Applications range from automatic enrolment in retirement plans to disclosure design.

Binary Credit Default SwapStocks

A credit default swap that settles for a fixed, pre-agreed amount if a credit event occurs, instead of paying the difference between face value and the recovery value of the reference obligation. Fixing the payout removes the need for an auction to determine recovery and makes the contract simpler to value, since only default probability and timing matter. It leaves the protection buyer with basis risk, because the fixed sum will rarely equal the loss actually incurred.

Black economyStocks

Economic activity deliberately concealed from the authorities so that tax, social contributions or regulation can be avoided, including undeclared cash work, unrecorded trade and the proceeds of illegal transactions. Because it is hidden, statisticians estimate its size indirectly, from discrepancies between income and expenditure measures, from currency demand or from electricity use. A large hidden sector narrows the tax base, distorts official output and employment figures, and leaves participants outside labor protections.

Black's ApproximationOptionsStocks

A method for valuing an American call on a stock paying known discrete dividends without building a lattice, proposed by Fischer Black. Two European calls are priced, one expiring at the option's maturity and one expiring just before the final ex-dividend date with the underlying reduced by the present value of the dividends, and the higher of the two values is taken. It approximates the early exercise decision rather than solving it exactly, so it can understate the true value.

Bond OptionStocks

An option giving the holder the right to buy or sell a specified bond at an agreed price on or before a set date. Valuation must respect that a bond's price converges to face value at maturity, so volatility cannot be treated as constant, and models are usually built on the term structure of interest rates rather than on the price alone. Callable and putable bonds embed the same economics, since the issuer or the holder owns an option written on the debt.

Back-to-Back Letters of CreditStocks

A pair of linked documentary credits used when an intermediary buys goods from a supplier and resells them to a final buyer. The intermediary receives a credit from the buyer's bank and uses it as security for a second credit issued in favour of the supplier. Terms are matched so that documents presented under the second credit support a presentation under the first, letting a trader finance a deal without tying up its own funds or revealing the counterparties to each other.

Bad CreditStocks

A borrowing record lenders read as high risk, usually reflecting missed or late payments, accounts in collection, heavy use of available limits, defaults, repossessions or bankruptcy filings. Bureaus condense the file into a score, and lower bands attract higher interest rates, smaller limits, security deposit requirements or outright declines. Most negative items age off a consumer report after a period fixed by law, and their weight in scoring fades as newer on-time history accumulates.

Balance of international paymentsFuturesStocks

A country's complete record of transactions with the rest of the world over a period, organised into the current account (trade in goods and services, primary income and transfers), the capital account, and the financial account recording changes in cross-border assets and liabilities. Under its double-entry construction the accounts sum to zero once net errors and omissions are included, so a current account deficit is necessarily matched by net inflows on the financial account.

Ballpark FigureOptionsStocks

A rough estimate produced quickly from approximate inputs to establish the order of magnitude of a number before detailed work begins. In finance it sanity-checks a valuation, a budget or a deal size, and it is meant to be accurate enough to show whether a proposal is plausible rather than precise enough to act on. Stating the assumptions behind one matters, because a casually rounded input can move the result by far more than the rounding suggests.

Bandwagon EffectOptionsStocks

A behavioural pattern in which people adopt a belief or action largely because others already have, so demand for something increases with the number who already hold it. In markets it appears as investors buying an asset after a run-up because the crowd is buying, amplifying price moves beyond what fundamentals justify and leaving positions crowded when sentiment turns. It is one of the channels behind momentum, herding and speculative bubbles.

Bank DepositsStocks

Money placed with a bank that becomes the bank's liability to the customer rather than property held in safekeeping. The bank owes repayment on the agreed terms and is free to lend the funds out, which is how deposits fund credit creation. Demand accounts are repayable on request while time deposits fix a maturity in exchange for a higher rate. In many countries a public scheme insures balances up to a limit set by the guarantee authority.

Bank Identification Number(BIN, Issuer Identification Number) Stocks

The leading digits of a payment card number, which identify the issuing institution together with the card's network, product type and country. Acquirers and processors read the field to route an authorization request to the correct network and issuer, and merchants use it to apply rules such as blocking prepaid cards or estimating interchange cost. The industry has moved to longer eight-digit ranges as issuance has grown.

Bank ReserveStocksCrypto

The portion of a bank's funds held as vault cash or as a balance in its account at the central bank rather than lent out or invested. Reserves settle interbank payments and meet withdrawal demand, and where a reserve requirement applies they must equal at least a set fraction of specified deposits. Central banks change the total supply of them through open market operations and pay or charge interest on balances to steer short-term rates.

Bank suspensionsStocks

Episodes in which a bank stops paying out deposits, either by its own decision or by supervisory order, so customers cannot withdraw funds. Suspensions were common during banking panics before deposit insurance existed, and mass suspensions in the early 1930s prompted the United States bank holiday and the creation of federal deposit insurance. Modern supervisors more often resolve a failing institution over a weekend, transferring insured balances to an acquiring bank.

Bare TrustStocks

A trust in which the beneficiary holds an absolute right to both capital and income, and the trustee's role is limited to holding legal title and acting on the beneficiary's instructions. Because the beneficiary is treated as economic owner, income and gains are usually taxed on them rather than within the trust. It is used for nominee shareholdings, for holding assets for a minor until the age of entitlement, and for simple estate arrangements.

Base YearStocksCrypto

The reference period an index is set equal to a round number in, commonly one hundred, so later readings express change relative to it. Price indices, industrial production series and constant-price national accounts all require one, and any real series is measured in that period's prices. Statistical agencies rebase periodically because spending patterns drift, and comparing two series built on different reference periods without adjustment produces misleading growth rates.

Bayes' Theorem(Bayes' rule) StocksCrypto

A rule for updating a probability when new evidence arrives: the posterior probability of a hypothesis equals the likelihood of the evidence given that hypothesis, multiplied by the prior probability, divided by the overall probability of the evidence. It formalises how far a signal should move a belief, and it explains why a test with a low false positive rate can still produce mostly false alarms when the condition being tested for is rare.

Benefit-Cost Ratio(BCR) Stocks

The present value of a project's benefits divided by the present value of its costs, both discounted at the same rate. A reading above one means discounted benefits exceed discounted costs, which is equivalent to a positive net present value. Because it is a ratio it ranks projects by efficiency per unit of cost rather than by total value created, so it can favour a small project over a larger one that adds more value overall.

Bernie MadoffStocksCrypto

The former Nasdaq chairman and founder of Bernard L. Madoff Investment Securities, who admitted in December 2008 that the firm's investment advisory business had for years paid purported returns out of new investor money rather than from trading, making it the largest known Ponzi arrangement. He received a 150-year sentence and died in prison in 2021. The case is studied for its warning signs: implausibly smooth returns, a tiny auditor, self-custody of assets and an unexplainable strategy.

Bilateral TradeStocksCrypto

Trade in goods and services between two countries, and the agreements governing it. A bilateral agreement sets tariff schedules, rules of origin, standards recognition and dispute procedures between those two parties only, which makes it faster to negotiate than a multilateral deal but produces overlapping rules once a country signs many. The bilateral balance with any single partner says little about a country's overall external position, which depends on total saving and investment.

Binance Coin(BNB) StocksFutures

The native token of BNB Chain, launched by the Binance exchange and now generally called BNB. It pays transaction fees on the chain, funds trading fee discounts and participation in exchange token sales, and is staked by the validators securing the network. Supply is reduced over time by scheduled burns funded from network activity, so total supply declines rather than inflates. Its value tracks the exchange's fortunes as well as underlying chain usage.

Binomial DistributionStocksCrypto

The probability distribution of the number of successes in a fixed number of independent trials that each succeed with the same probability. The chance of exactly k successes multiplies the number of ways to arrange them by the success probability raised to k and the failure probability raised to the remainder. Its mean equals trials times probability and its variance equals trials times probability times one minus probability. It underlies binomial option pricing lattices.

Bond CovenantStocks

A promise written into a bond indenture that constrains the issuer while the debt is outstanding. Affirmative covenants require actions such as filing audited accounts, maintaining insurance and keeping specified ratios within limits. Negative covenants forbid actions such as pledging assets to other lenders, selling core subsidiaries or paying dividends above a threshold. Breach is an event of default that can accelerate repayment, so covenant strength feeds pricing and weak packages trade at wider spreads.

Bonus DepreciationStocks

A United States tax provision letting a business deduct a percentage of the cost of qualifying property in the year it is placed in service instead of recovering it across the asset's normal schedule. It accelerates deductions rather than increasing them in total, since later-year depreciation is correspondingly smaller, so the benefit is one of timing and cash flow. Congress sets the applicable percentage and the property that qualifies, and both have been changed repeatedly.

Bonus Issue(scrip issue, capitalisation issue) Stocks

A distribution of additional shares to existing holders in proportion to their holdings, funded by capitalising reserves rather than by any payment from shareholders. Share count rises while the company's assets and earnings are unchanged, so the price per share adjusts downward and each holder's percentage ownership is unaffected. Companies use it to bring an unwieldy share price into a more tradable range and to signal confidence in retained earnings.

Bounced CheckStocks

A check the paying bank refuses to honour, most often because the account lacks sufficient funds, but also for a stop payment order, a closed account, a stale or post-dated instrument, or a signature mismatch. The item is returned unpaid to the depositing bank, the payee's credit is reversed, and both the writer and the depositor can be charged fees. Repeatedly writing unfunded checks can lead to account closure and, where intent is shown, criminal liability.

Brand EquityStocks

The commercial value a name and its associations add beyond the functional attributes of the product itself, appearing as the ability to charge a price premium, retain customers, win distribution and enter new categories at lower cost. It is built from awareness, perceived quality, associations and loyalty. Internally generated brand value is not recorded on the balance sheet under most accounting standards, so it appears only when a brand is acquired and recognised as an intangible asset.

Brand ExtensionStocks

Launching a product in a new category under an existing brand name to borrow its awareness and associations, lowering the cost of gaining trial and shelf space compared with building a new name from scratch. Success depends on perceived fit between the parent's associations and the new category. A poor fit can dilute the parent's meaning, and a failure in the new category can damage the core business, which is why some firms deliberately use separate names.

Break-Even AnalysisStocks

A technique that finds the activity level at which total revenue equals total cost, so profit is exactly zero. In its standard form, fixed costs are divided by contribution margin per unit (selling price minus variable cost per unit) to give break-even volume, or by the contribution margin ratio to give break-even sales value. It quantifies operating leverage, shows how far volume can fall before losses begin, and is used to test pricing, cost structure and capacity decisions.

Business InsuranceStocks

Cover bought by a firm against the losses its operations can produce, spanning property damage, business interruption, general and product liability, professional indemnity, commercial auto, workers compensation, cyber and crime. Policies transfer defined risks to an insurer in return for premium, subject to limits, deductibles and exclusions. Pricing reflects industry, revenue, claims history and controls, and gaps between what a policy names and what the business actually does are a common source of denied claims.

Business PlanStocks

A written document setting out what a business does, the market it serves, how it intends to compete, how it will operate, and the financial results it projects. It normally contains a market and competitor analysis, a description of the offering, an operating and staffing plan, and forecasts of revenue, costs, cash flow and funding need. Lenders and investors read it as evidence that management understands its own unit economics, so its assumptions matter more than its conclusions.

Business RiskStocksCrypto

The uncertainty in a company's operating profit arising from the business itself rather than from how it is financed, driven by demand variability, selling prices, input costs, competition, technology change, regulation and the mix of fixed to variable costs. A firm with high operating leverage carries more of it, because a given change in sales moves operating income proportionally further. It is analysed separately from financial risk, which comes from the debt layered on top.

Business ValuationsStocks

Exercises estimating what a company or an ownership stake in it is worth, usually for a sale, a fundraising, a shareholder dispute, an estate filing or financial reporting. Three approaches dominate: income, discounting expected future cash flows; market, applying multiples from comparable companies or transactions; and asset, restating the balance sheet at current values. Purpose and standard of value drive the result, and controlling stakes and illiquid private holdings carry premiums and discounts.

Buyer's MarketStocksCrypto

Conditions in which supply exceeds demand at prevailing prices, so purchasers hold the negotiating advantage. Signs include rising inventory, longer time on market, listings selling below asking price, and sellers offering concessions such as covering closing costs or repairs. The phrase is used mainly in housing but applies wherever inventory is measurable. Conditions are local and can differ by price band within one city, so aggregate national readings often mislead.

B-NoteStocks

A subordinated tranche or loan participation ranking behind the A-note, paid after it and absorbing losses before it. In commercial real estate lending, one mortgage is often split so a senior A-note is sold into a securitisation while the B-note is held by an investor willing to take first loss in exchange for a higher yield. An intercreditor agreement governs cash flow order, voting and the B-note holder's cure and purchase rights on default.

Back DoorStocks

In United Kingdom money market usage, the Bank of England relieving a cash shortage by buying Treasury bills and other eligible paper in the open market, rather than lending directly to institutions at a published rate, which is the front door. The distinction matters because open market purchases add reserves without signalling a policy rate. The same phrase is also used more loosely for any route into a market or a listing that bypasses the standard process.

Backing AwayStocksCrypto

A market maker failing to honour a firm quote it has published, by refusing to trade at that price for at least the quoted size when a counterparty seeks to hit or lift it. United States self-regulatory rules treat firm quotes as binding and make backing away a rule violation, because a quote nobody can execute against corrupts the displayed price. Enforcement typically arises where a dealer widens or withdraws only after seeing an incoming order.

BACSStocksCrypto

The United Kingdom's automated clearing system for bulk sterling payments, used for direct debits, salary and pension credits and supplier payments. Instructions are submitted in batches and settle on a three working day cycle: submission on the first day, processing on the second, and debit and credit of the two accounts on the third. It handles low-value recurring payments, in contrast to CHAPS for same-day high-value transfers and Faster Payments for near-instant retail transfers.

Bad LoanStocks

A loan the lender no longer expects to be repaid in full according to its original terms, typically because scheduled payments are past due beyond a set number of days or because the borrower's circumstances make default likely. The lender stops accruing interest into income, reclassifies the exposure and raises a provision against expected loss, which reduces reported earnings and capital. Aggregate bad loan ratios are a standard supervisory measure of banking system stress.

Balance of TradeStocksCrypto

The value of a country's exports of goods and services minus its imports over a period. A surplus means exports exceed imports, a deficit the reverse. It is the largest component of the current account, which also includes investment income and transfers, and it is matched by offsetting entries in the financial account, so a persistent trade deficit is accompanied by net capital inflows. Movements reflect exchange rates, relative demand and commodity prices as much as competitiveness.

Balancing ChargeStocks

A United Kingdom tax adjustment made when an asset on which capital allowances were claimed is sold, scrapped or otherwise disposed of. If the disposal proceeds exceed the asset's remaining written-down value for tax purposes, the excess is added back to taxable profit as a balancing charge, clawing back relief that turned out to be too generous. Where proceeds fall short, the shortfall may instead be a balancing allowance. The rules are set by HM Revenue and Customs.

Bank ChargeStocks

A fee a bank deducts from a customer's account for operating it or for a specific service: monthly account maintenance, unarranged overdrafts, returned items, wire transfers, foreign transactions or cash handling. Charges appear on the statement as debits separate from interest, and reconciling them is a routine step in bank reconciliation. Disclosure rules in most jurisdictions require a fee schedule to be published and advance notice given before a charge is introduced or increased.

Bank Discount RateStocks

The convention used to quote the return on short-term instruments sold at a discount, such as Treasury bills and commercial paper. It expresses the discount as a percentage of face value rather than of the price paid, and annualises using a 360-day year. Both choices make the quoted figure lower than the true yield an investor earns on the money actually invested, so the discount rate must be converted to a bond equivalent yield before comparison with coupon bonds.

Bank GiroStocks

A credit transfer arrangement, long established in the United Kingdom and continental Europe, in which the payer instructs their own bank to move money into the payee's account. Payment is pushed by the payer rather than pulled by the payee, which is the opposite of a direct debit. Bill payment slips printed with the payee's sorting code and account number let a customer pay at any branch, and the mechanism now runs through electronic clearing rather than paper.

Bank StatementStocks

A periodic record issued by a bank listing every credit and debit on an account over the statement period, with the opening and closing balances. It is the external evidence against which a business reconciles its own cash ledger, and the differences it exposes are usually timing items such as uncleared deposits and unpresented cheques, or entries the business had not recorded such as fees and interest. Lenders also use statements to verify income and cash flow.

Banking CrisisStocks

An episode in which a significant part of a banking system becomes insolvent or illiquid at the same time, so credit contracts sharply and depositors or wholesale funders withdraw. Losses on loans or securities erode capital, funding costs rise, and confidence in one institution spills into others because their exposures and funding sources overlap. Typical resolution involves central bank liquidity, deposit guarantees, recapitalisation or resolution of failed banks, and the fiscal cost is usually large.

Banque de FranceStocks

The central bank of France, founded in 1800 and now a member of the Eurosystem alongside the European Central Bank and the other national central banks of the euro area. Since the introduction of the euro, monetary policy for the currency is decided centrally and implemented nationally, so the Banque de France conducts open market operations with French counterparties, supervises banks and insurers through the ACPR, manages payment systems and compiles national financial statistics.

BargainStocksCrypto

On the London Stock Exchange, the traditional word for a completed transaction in securities, regardless of whether the price was favourable. Daily bargain counts were long published as a measure of activity alongside turnover value, since the two can move apart when average trade size changes. The broker's contract note confirming a bargain records the security, quantity, price, commission, any stamp duty and the settlement date.

Barrier SwaptionOptionsStocks

A swaption whose right to enter the underlying interest rate swap comes into existence or disappears when a reference rate touches a stated barrier. A knock-in version becomes exercisable only if the barrier is reached, and a knock-out version is cancelled if it is. Because the seller escapes the payoff in some paths, the premium is lower than for the equivalent standard swaption, and the discount widens as the barrier is placed nearer current rates.

Basket AggregateStocks

A single aggregate limit applying jointly across several different lines of coverage within one insurance programme, so losses from property, liability and other included lines all erode the same ceiling. Combining the lines usually costs less than buying separate aggregates because the insurer benefits from diversification across them. The trade-off for the buyer is that a heavy year in one line can exhaust the shared limit and leave the other lines unprotected for the remainder of the period.

Basket DeductibleStocks

A retention applied to the combined losses of several coverages in one programme rather than separately to each. Losses across the included lines accumulate against one deductible, and the insurer pays only once the combined total is exceeded. For a buyer with frequent small losses spread across lines, this reaches the insurer's layer sooner than several individual deductibles would. Programme wordings define precisely which lines feed the basket and over what period the accumulation runs.

Bay StreetStocks

The street in downtown Toronto that gives its name, by extension, to Canada's financial industry, in the way Wall Street stands for the American one. The Toronto Stock Exchange and the head offices of the major Canadian banks and securities dealers sit in the surrounding financial district. Used figuratively, the term refers to the collective view or interests of Canadian bankers, brokers and fund managers rather than to a physical address.

Belly-UpStocks

Slang for a business that has failed and ceased trading, usually through insolvency. In formal terms the company can no longer pay debts as they fall due, so control passes to an administrator, receiver or trustee who realises the assets and distributes proceeds in the statutory order: secured creditors first, then preferential and unsecured claims, with equity holders last and normally receiving nothing. The phrase describes the outcome, not any particular legal procedure.

Big BoardStocksCrypto

A long-standing nickname for the New York Stock Exchange, and by extension for the list of securities admitted to trade there. It dates from the era when quotations were chalked on a large board on the exchange floor. The label carried weight historically because listing there imposed stricter size, earnings and governance standards than rival venues, so moving from an over-the-counter market to the Big Board was treated as a signal of a company's maturity.

Big UgliesStocks

United Kingdom market slang for large, unglamorous industrial companies: heavy engineering, mining, construction, chemicals and defence. The name reflects the businesses being capital intensive, cyclical and unfashionable rather than any judgment about their financial condition. They typically trade on low earnings multiples, pay substantial dividends and move with the industrial cycle, so they attract value and income buyers while being ignored during periods when investors favour growth sectors.

Bilateral NettingStocksCrypto

An agreement between two counterparties to combine their mutual obligations into a single net amount rather than settling each one gross. Payment netting reduces the number and size of daily transfers, while close-out netting lets the non-defaulting party terminate every trade under the master agreement and settle one net figure if the other fails. Because it converts many gross claims into one net claim, it is the main reason derivatives exposure is measured on a net basis for capital purposes.

BillStocks

A short-term debt instrument issued at a discount to face value and redeemed at face value, with the difference serving as the return instead of a coupon. Government bills, commercial bills and bank bills follow this pattern and typically mature within a year. Yields are quoted on a discount basis using the face value as the denominator, so converting to a bond equivalent yield is necessary before comparing them with coupon-bearing securities.

BIS(Bank for International Settlements) StocksCrypto

The Bank for International Settlements, established in 1930 in Basel and owned by central banks. It provides banking services to its member central banks, hosts the committees that write international standards including the Basel Committee on Banking Supervision and the Committee on Payments and Market Infrastructures, and publishes widely used statistics on cross-border banking, debt securities and foreign exchange turnover. It does not supervise banks itself: national authorities implement and enforce the standards agreed there.

Blended Finite RiskStocksCrypto

A reinsurance or corporate risk transfer structure combining conventional risk transfer with finite risk features, so part of the contract genuinely shifts underwriting risk to the reinsurer while part functions as a funding arrangement built from the insured's own premiums plus investment income. Multi-year terms, an experience account and profit commissions are typical. Accounting standards require enough genuine risk transfer for the contract to be treated as insurance rather than as a deposit on the balance sheet.

Block HolderStocks

A shareholder owning a large enough stake in a company to have a meaningful influence over it, commonly a founder, family, corporate partner, pension fund or activist. Governance research treats blockholders as a monitoring mechanism because their stake is big enough to justify the cost of scrutinising management, though it can also let them extract private benefits at the expense of dispersed holders. United States rules require public disclosure once beneficial ownership passes a stated threshold.

Blocked AccountStocks

An account whose funds cannot be moved freely, either because a government has frozen it under sanctions or exchange control rules, or because a court order or contract restricts withdrawals. The balance still belongs to the holder, but the bank is prohibited from executing instructions on it until the restriction is lifted or a licence is granted. Banks must report frozen balances to the relevant authority, and unauthorised release exposes the institution to penalties.

Blocked CurrencyStocksFutures

A currency that exchange control rules prevent being converted into foreign currency or moved abroad freely. Companies earning revenue in one usually find the money is trapped locally: it can be spent inside the country but not repatriated as dividends or intercompany payments without official approval. Firms respond by reinvesting locally, sourcing inputs domestically or using parallel and offshore non-deliverable markets, and accountants must decide what exchange rate to translate the trapped balance at.

BlowoutStocksCrypto

Used two ways in markets. In new issues it describes an offering that sells out almost immediately at or above the indicated price because demand far exceeds the amount available, forcing heavy scaling back of allocations. In credit and spread trading it describes a sudden sharp widening of a spread, such as a credit spread or a swap spread, usually driven by a rush to reduce risk rather than by any new information about the specific issuer.

BoblStocksFutures

Short for Bundesobligation, the German federal government's medium-term note, and by extension for the Euro-Bobl futures contract on Eurex that references a notional five-year German government bond. The contract sits between the Schatz at the short end and the Bund at ten years, and the three together give traders a way to take positions on the shape of the euro area's benchmark yield curve rather than only its overall level.

BoilerplateStocks

Standardised contract language reused across many agreements with little or no negotiation, such as governing law, notices, severability and force majeure clauses in a bond indenture or loan agreement. Standardisation lowers drafting cost and lets the market price documents without reading every one, but it also means an unexamined clause can carry real consequences, which is what litigation over pari passu and collective action wording in sovereign bonds demonstrated. Boilerplate is not the same as unimportant.

Bond ResolutionStocks

The formal document by which a municipal or governmental issuer authorises a bond issue and sets the contract with bondholders. It specifies the amount, maturity schedule and interest terms, the revenues or taxes pledged to repay them, the flow of funds through debt service and reserve accounts, and covenants such as rate covenants and additional bonds tests limiting further borrowing on the same pledge. Analysts read it to establish exactly what secures the bonds and in what priority.

BookStocksCrypto

A trader's or desk's collection of open positions, together with the risk they carry. Running a book means quoting prices to clients and managing the resulting inventory rather than taking directional bets, so the desk hedges the exposures it does not want and monitors aggregate sensitivities such as delta and duration. The same word describes an underwriter's record of investor demand during a bookbuild, and the order book of resting bids and offers on an exchange.

BorsaStocksCrypto

The Italian word for a securities exchange, and part of the formal names of several markets, including Borsa Italiana in Milan and Borsa Istanbul. Like bourse in French usage, it derives from the Van der Beurze family of Bruges, whose house hosted early merchant trading. In English-language financial writing the word is normally kept when naming a specific Italian or Turkish exchange rather than translated.

Bottom FishingStocks

Buying securities that have fallen heavily on the view that the price now sits below what the business is worth. The approach depends on distinguishing a temporary dislocation from permanent impairment, since a share that has dropped a long way can drop further if earnings power, the balance sheet or the industry structure has genuinely deteriorated. Practitioners usually look for balance sheet strength and insider buying rather than treating the size of the decline itself as evidence.

Bounded RationalityStocks

The idea, introduced by Herbert Simon, that decision makers act rationally only within the limits of the information they have, the time available and their capacity to process it. Rather than optimising, people satisfice: they search until an option meets an acceptable threshold and then stop. The concept underpins behavioural finance, where investors rely on simplifying heuristics and available information instead of evaluating the full distribution of outcomes, producing systematic and predictable departures from textbook rationality.

BourseStocksCrypto

The French term for a securities or commodities exchange, used in English for continental European markets and retained in names such as Euronext's former Bourse de Paris. The word traces to the Van der Beurze family of Bruges, whose premises hosted merchant trading in the fourteenth century. As a general noun it means any organised exchange, and it appears in compounds such as bourse listing and bourse turnover in European market commentary.

Bricks and MortarStocks

A business that serves customers through physical premises rather than only online. In banking it describes branch networks, which carry lease, staffing and security costs that a digital-only competitor avoids, and which show up in a higher cost-to-income ratio. The offsetting arguments are cash handling, complex advice and customer acquisition among segments that prefer in-person service. Retail and banking analysts track branch counts and cost per branch as a measure of how a network is being rationalised.

Broad Evidence RuleStocks

A standard used in property insurance for measuring actual cash value, under which the adjuster may consider any relevant evidence of the damaged property's worth rather than being confined to replacement cost minus depreciation. Market value, income the property generated, obsolescence, its condition and the cost to replace it can all be weighed. Jurisdictions differ over whether this rule or the strict depreciation formula applies, so the governing state law determines the settlement basis.

BrokerageStocksCrypto

A firm that arranges securities, commodity or insurance transactions on behalf of clients, and also the commission it charges for doing so. Acting as agent, the broker executes in the client's name and does not take the other side of the trade, which distinguishes it from a dealer trading as principal from its own inventory. Most firms register in both capacities. Revenue comes from commissions, spreads, margin lending, payment for order flow and interest on client cash.

Brownian MotionStocks

A continuous-time random process whose increments are independent, normally distributed with variance proportional to elapsed time, and whose paths are continuous but nowhere smooth. It is the mathematical engine of most option pricing: geometric Brownian motion assumes the logarithm of an asset price follows it, which produces lognormal prices and underpins the Black-Scholes framework. Because it generates thin tails and constant volatility, real return distributions depart from it, which is why jump and stochastic volatility extensions exist.

Budget SurplusStocks

The amount by which a government's revenue exceeds its spending over a fiscal period, the opposite of a deficit. A surplus lets the government repay outstanding debt or accumulate financial assets, reducing the stock of securities held by the private sector. Analysts usually separate the primary balance, which excludes interest payments, from the headline balance, and adjust for the economic cycle, since tax receipts rise and transfer payments fall automatically when output is strong.

Buy-Back DeductibleStocks

An option under which a policyholder pays additional premium to remove or reduce a deductible that would otherwise apply, so the insurer responds from the first dollar or from a lower retention. It appears where a standard form carries a large mandatory deductible for a specific peril, such as windstorm or earthquake, and the insured prefers to convert an uncertain retained loss into a known premium. The insurer prices it against the expected frequency of losses inside the bought-back layer.

Backwards InductionOptionsStocks

A solution method that starts at the final date of a decision problem and works back to the present, computing the optimal action at each earlier node given what would happen afterwards. In option pricing it is how binomial and trinomial trees are solved: the payoff is written at every terminal node, then each earlier node takes the discounted expected value of its successors, compared at each American exercise date against the immediate exercise value. Game theory uses the same logic for sequential games.

Basel Committee on Banking SupervisionStocks

The international body, hosted at the Bank for International Settlements, where banking supervisors from major jurisdictions agree common standards for bank regulation. Its Basel accords set minimum capital ratios against risk-weighted assets, leverage and liquidity requirements, and supervisory review and disclosure expectations. The Committee has no legal authority of its own: each member jurisdiction must legislate the standards into national law, which is why implementation timing and detail differ across countries.

Bilateral ClearingStocksCrypto

Settling and managing a trade directly between the two counterparties rather than through a central counterparty. Each side faces the other's credit risk for the life of the contract, managed by a master agreement, netting provisions and margin exchanged between them. It leaves exposures spread across a web of individual relationships whose scale is hard for anyone to observe, which is why post-crisis rules pushed standardised derivatives toward central clearing and imposed margin requirements on what remains bilateral.

Bearer InstrumentStocks

A security whose owner is whoever physically holds the document, with no register of holders maintained by the issuer. Payment is made against presentation of the instrument, and historically interest was claimed by detaching and presenting coupons. Transfer requires only delivery, which made these instruments convenient and also made them a vehicle for tax evasion and money laundering. Anti-money laundering rules and tax legislation have largely ended new issuance in major markets, and outstanding bearer securities have been immobilised in depositories or converted into registered or book entry form.

Benchmark ErrorStocksCrypto

The distortion introduced when a portfolio's performance or risk is measured against an index that does not validly represent the opportunity set being tested. Roll's critique makes the point formally for the capital asset pricing model: alpha and beta are defined relative to the true market portfolio, so substituting a stock index for it means any conclusion about mispricing may reflect the proxy rather than the manager. In practice it shows up as apparent skill produced by a style or sector tilt the chosen benchmark does not contain.

Bull and Bear CDsStocks

Certificates of deposit whose interest is linked to the performance of a market index rather than fixed. A bull CD pays a return that rises with the index, typically a stated participation rate applied to the index gain, while a bear CD pays more when the index falls. Both normally return the deposited principal at maturity and pay little or no interest if the linked move goes the wrong way, so the depositor gives up ordinary interest in exchange for the contingent payoff. Issuing bank credit risk and deposit insurance limits still apply.

backfill biasStocks

The upward distortion in a database's reported returns that arises when a fund is added together with its earlier track record. Managers tend to seek inclusion after a good run and to stay private after a poor one, so the histories filled in are systematically better than those never submitted at all. Hedge fund and private fund indices are most exposed because reporting is voluntary. Researchers address it by discarding the months before a fund's listing date, which typically lowers measured average returns.

bank failureStocks

The point at which a bank can no longer meet its obligations and its supervisor closes or resolves it. Causes divide into insolvency, where loan losses exhaust capital, and illiquidity, where funding disappears faster than assets can be sold, and the two interact because doubt about solvency triggers withdrawals. Resolution transfers insured deposits to a healthy institution or pays them out from the deposit insurance fund, while shareholders and often unsecured creditors absorb losses in order of their ranking.

bank panicStocks

A situation in which depositors withdraw from many banks at once, driven by fear about the banking system rather than by doubts about a single institution. It spreads because depositors cannot easily tell sound banks from weak ones, and because banks fund long-dated loans with money repayable on demand, so any of them can be forced into selling assets at distressed prices. Deposit insurance and a central bank willing to lend against good collateral are the standard defences, since both remove the incentive to withdraw first.

benchmark portfolioStocksCrypto

The reference set of holdings against which a manager's results and risk are measured, usually an index representing the opportunity set the mandate allows. It defines what neutral means: any position differing from it is an active decision, the return difference is the active return, and the volatility of that difference is tracking error. For the comparison to mean anything the reference must be specified in advance, be investable, and match the mandate's constraints, or measured skill will reflect the choice of yardstick instead.

branchesStocks

Local offices through which a bank delivers services, operating under the parent institution's legal identity and capital rather than as separate companies. Because such an office is not a distinct legal entity, its assets and liabilities sit on the parent's balance sheet and its obligations are the parent's obligations, which is the key difference from a subsidiary. For cross-border operations the arrangement determines supervision and protection: the home authority takes the lead, and the home deposit guarantee scheme generally applies if the parent fails.

brokered marketStocksCrypto

A market in which intermediaries search out counterparties and arrange trades between them without taking positions themselves, earning a commission for making the match. It suits assets that trade infrequently or in large, non-standard sizes, such as commercial property, block equity trades and much of the corporate bond market, where posting continuous quotes would be costly. It sits between a direct search market, where principals find each other unaided, and a dealer market, where the intermediary buys and sells from its own inventory.

BCG Growth-Share MatrixStocks

A portfolio planning tool from the Boston Consulting Group that plots a company's business units on two axes: market growth rate and relative market share against the largest competitor. The four quadrants are stars, high share in a fast growing market; cash cows, high share in a slow market that fund the rest; question marks, low share in a fast market needing investment or exit; and dogs, low share in a slow market. Its logic is cash allocation across units, and it assumes share drives cost advantage.

Backward IntegrationStocks

A growth strategy in which a company acquires or builds the capability of its own suppliers, moving upstream in its value chain. A retailer buying a manufacturer, or a steelmaker buying an iron ore mine, are examples. The stated aims are securing input supply, capturing the supplier's margin and controlling quality or technology. The costs are capital tied up in a business with different economics, loss of the flexibility to switch suppliers, and antitrust scrutiny where the acquired supplier also serves competitors.

Bail BondStocks

A financial guarantee that a criminal defendant released before trial will appear in court. A surety company pledges the full bail amount to the court in exchange for a non-refundable fee, usually a set percentage of the amount, and often requires collateral or a co-signer. If the defendant appears, the obligation ends and the fee is kept. If not, the court can forfeit the guarantee, and the surety pursues the defendant and the collateral. Rules, fee caps and whether commercial bail is permitted vary by jurisdiction.

Bait and SwitchStocksCrypto

A selling practice in which a seller advertises a product on attractive terms it does not intend to supply, then steers the responding customer to a costlier or less favorable alternative. It appears in financial services as an advertised loan rate available only to a tiny set of applicants who are offered a higher rate at closing. It is unlawful as a deceptive practice in many jurisdictions, and in the United States the Federal Trade Commission and, for consumer credit, the Consumer Financial Protection Bureau enforce against it.

Balanced BudgetStocks

A fiscal position in which government revenue equals expenditure over a stated period, so no net borrowing is required. A rule requiring it, whether constitutional or statutory, forces the two to match either every year or across a cycle. The cyclical version is the softer one, since a strict annual rule requires cutting spending or raising taxes in a downturn, exactly when revenue falls automatically, and so amplifies the cycle rather than cushioning it. Most United States states operate under a form of the rule while the federal government does not.

Balanced ScorecardOptionsStocks

A management framework tracking performance across four linked perspectives rather than financial results alone: financial, customer, internal process, and learning and growth. Each perspective carries a small set of objectives, measures and targets, and the causal chain runs upward, with capability and process improvements expected to show up later in customer and financial outcomes. Its purpose is to make strategy operational and to counter the incentive to manage only the lagging financial numbers.

Balloon PaymentStocks

A single large payment of remaining principal due at the end of a loan whose scheduled installments were too small to retire the balance. The installments are commonly sized on a longer amortization schedule than the loan's actual term, or cover interest only, leaving a lump sum at maturity. That lowers the monthly payment and raises refinancing risk, because the borrower must find new financing or sell the asset when the payment falls due, on whatever terms and property values then prevail.

Bank ReconciliationStocks

A control procedure comparing the cash balance in a company's own ledger with the balance on its bank statement and explaining every difference. Typical reconciling items are deposits in transit and checks issued but not yet presented, which affect the bank side, and bank fees, interest, direct debits and errors, which require entries on the company side. Performing it regularly is a basic defense against unrecorded transactions, duplicate payments and misappropriation, which is why auditors test whether it is done and reviewed.

Bank RunStocks

A situation in which many depositors withdraw funds from a bank at once because they doubt it can meet its obligations. It is self-reinforcing: a bank funds long-dated illiquid loans with deposits repayable on demand, so once withdrawals exceed liquid resources the bank must sell assets at distressed prices, worsening the position that triggered the fear. Deposit insurance, central bank lending facilities and liquidity requirements exist to break that loop, though uninsured depositors can still move, and electronic transfer makes such episodes faster than they once were.

Bank rateStocks

The interest rate a central bank charges commercial banks for short-term borrowing, or in some countries the name of its main policy rate. It sets a ceiling or a floor for overnight market rates depending on how the facility is designed, and changes in it feed through to what banks charge borrowers and pay savers. The term is used for the Bank of England's policy rate and, historically, for the United States discount rate, so the precise mechanics depend on the central bank in question.

Bank-Owned Life InsuranceStocks

Permanent life insurance a bank buys on the lives of certain officers or employees, with the bank as owner and beneficiary. The bank pays a single or limited premium, the cash value grows without current tax, and the death benefit is generally received free of federal income tax, so it offsets the long-run cost of employee benefit obligations. United States regulators require insurable interest, employee consent and a documented pre-purchase analysis, and holdings are limited relative to capital because the asset is illiquid and carries insurer credit risk.

Barrels Of Oil Equivalent Per DayFuturesStocks

A production rate that converts natural gas and other hydrocarbons into the energy equivalent of crude oil, so mixed output can be quoted as a single daily figure. The customary conversion treats roughly six thousand cubic feet of natural gas as one barrel of oil equivalent, based on heat content. It standardizes comparison across producers, but energy equivalence is not value equivalence: gas usually sells for far less per unit of energy than oil, so two companies with the same rate can generate very different revenue.

Base EffectStocks

The distortion in a year-over-year growth or inflation rate caused by an unusual level in the comparison period rather than by anything happening now. If prices collapsed a year ago, the current annual rate looks high even with normal monthly changes, and the reverse holds after a spike. Analysts strip it out by looking at month-over-month or annualized sequential rates, or by comparing with a period before the distortion, which is why headline annual figures can mislead for several months after a shock.

Beacon (Pinnacle) ScoreStocks

A consumer credit score marketed by Equifax and built on FICO scoring models, so it evaluates the same broad factors: payment history, amounts owed relative to limits, length of credit history, mix of credit types and recent applications. Beacon was the original brand name and Pinnacle a later generation, and lenders may pull a version tuned to a specific product such as auto or mortgage lending. Scores from different bureaus and model versions differ because the underlying files and the model generations differ.

Below-the-Line AdvertisingStocks

Promotional activity aimed at a specific, identifiable audience rather than broadcast to a mass market: direct mail, email, sponsorship, trade shows, in-store promotion, sampling and targeted digital campaigns. The name comes from an old agency accounting split in which commissionable mass media sat above a line in the budget and non-commissionable targeted work sat below it. Its practical distinction is measurability: response can usually be traced to the individual recipient, so cost per acquisition is directly observable.

Best EndeavorsStocks

A contractual obligation, used mainly in English law drafting, requiring a party to take all the steps a prudent and determined person acting in its own interest would take to achieve a stated result, including steps that cost it money. It is the most demanding of the common effort standards, above reasonable efforts and all reasonable efforts, though the boundaries are shaped by case law and by the contract's own wording. It does not guarantee the outcome: it obliges effort, and breach is judged on what was actually done.

Bid BondStocks

A surety bond a contractor submits with a tender, guaranteeing that if its bid is accepted it will enter the contract and provide the required performance and payment bonds. If the bidder withdraws or refuses, the surety pays the project owner the bonded amount or the difference between that bid and the next acceptable one, up to the penal sum, and then seeks recovery from the contractor. It is standard on public works and screens out bidders a surety will not underwrite.

Bill AuctionStocks

The competitive process by which a government sells short-term debt. Bidders submit competitive bids naming a yield and a quantity, or non-competitive bids accepting whatever yield the auction sets in exchange for guaranteed allocation. Bids are filled from the lowest yield upward until the offering is covered, and in a single-price auction every winner pays the highest accepted yield. Results are watched for the bid-to-cover ratio and the tail, which show how strong demand was relative to expectations.

Blended RateStocks

A single interest rate representing the weighted average cost of several borrowings or the average yield of several assets, weighted by balance. It is used when two loans are combined into one, when a lender refinances part of a balance at a new rate while keeping the rest, and when reporting a portfolio's overall cost of funds. Because the weights are balances, the rate shifts as those balances amortize at different speeds, so a figure quoted at inception is not fixed over the life of the loans.

Blue BookStocks

A published guide of reference values for a class of used assets, most familiarly motor vehicles, giving typical trade-in, private-sale and retail prices by model, year, mileage and condition. Lenders use it to size a loan against collateral, insurers to settle a total loss, and tax authorities to value a donated or transferred vehicle. The figures are survey-based estimates of market transactions rather than an offer to buy, so an actual sale price can sit well above or below the quoted value.

Blue OceanOptionsStocks

A market space with little or no existing competition, created by redefining what an industry offers rather than fighting for share in an established one. The contrasting red ocean is a defined market where rivals compete on the same dimensions and margins compress. The associated strategy prescribes changing the value curve: eliminating and reducing features the industry takes for granted while raising and creating others, so a new group of buyers is served at a cost structure that need not follow the industry norm.

Board of GovernorsStocks

The seven-member body in Washington that heads the Federal Reserve System. Governors are nominated by the President and confirmed by the Senate for staggered fourteen-year terms, with the Chair and Vice Chairs appointed to shorter renewable terms in those roles. The Board supervises and regulates bank holding companies and state member banks, sets reserve requirements and approves the discount rate requested by the Reserve Banks, and its members hold a permanent majority of the votes on the Federal Open Market Committee.

Board of TrusteesStocks

The governing body of a trust, endowment, pension fund, foundation or non-profit institution, holding legal responsibility for the assets and their use. Trustees owe fiduciary duties of loyalty and prudence to the beneficiaries, and their tasks typically include setting the investment policy statement, appointing and monitoring managers and custodians, approving spending or benefit policy, and overseeing compliance. In a pension context they are distinct from the sponsoring employer, which is what keeps plan assets separate from the sponsor's other creditors.

BoomStocksCrypto

A phase of the business cycle in which output grows above its sustainable trend, unemployment falls below its long-run rate, capacity utilization is high and credit expands quickly. Because demand runs ahead of what labor and capital can supply, wages and prices typically accelerate, which is usually what prompts a central bank to tighten policy. Asset prices often rise faster than the earnings behind them in such a phase, and reported profits and credit quality tend to look better than the through-cycle average.

Boom And Bust CycleStocksCrypto

A pattern in which rapid expansion in credit, asset prices and investment is followed by a sharp contraction in the same variables. The upswing is amplified by rising collateral values that support more borrowing, which in turn supports prices. When expectations break the loop runs in reverse: falling collateral values force deleveraging and asset sales, pushing prices down further. It is distinguished from an ordinary business cycle by the size of the swing and by the central role leverage plays in both directions.

Boundary ConditionsOptionsStocks

The limits on a derivative's price that follow from arbitrage alone, before any pricing model is chosen. For an American call on a stock paying no dividend, the price must sit at or above the greater of zero and the stock price minus the discounted strike, and at or below the stock price itself. Put prices are bounded in the mirror image, and put-call parity ties the two together. Because they hold without assumptions about volatility or return distributions, a quote outside them is a direct arbitrage opportunity.

Branch BankingStocks

The provision of banking services through a network of physical offices operating under a single institution's charter, rather than from one location or through a separate legal entity in each place. Branches share the parent's capital, license and balance sheet, which makes expansion cheaper than chartering new banks. United States law restricted interstate expansion of this kind for most of the twentieth century, and the Riegle-Neal Act of 1994 largely removed the barriers, which accelerated consolidation into nationwide networks.

BrandStocks

The set of associations a name, mark and identity carry in buyers' minds, which lets a company charge more, sell more easily or retain customers longer than an unbranded equivalent could. In accounting, one that is purchased is recognized as an intangible asset at what was paid for it, while one built internally is not capitalized, so the marketing spend that created it appears as expense and the value never appears on the balance sheet. That asymmetry is a common reason reported book value understates a consumer company.

Brand ManagementStocks

The function responsible for what a brand stands for and how consistently it is expressed: positioning, naming, pricing tier, packaging, communication and the standards applied across channels and licensees. Its financial purpose is to build and defend the price premium and loyalty that let the brand earn a return above the cost of the products behind it. Practitioners track measures such as unaided awareness, consideration, willingness to pay a premium and repeat purchase, since those lead the revenue effects rather than following them.

BRICS(Brazil, Russia, India, China and South Africa) FuturesStocks

An acronym for a grouping of large emerging economies: Brazil, Russia, India, China and South Africa. It was coined by an investment bank economist in 2001 to describe fast-growing markets expected to take a rising share of world output, initially without South Africa, which joined the political grouping later. The countries hold summits and have created shared institutions such as the New Development Bank, and membership has expanded. It is a diplomatic and marketing label rather than an asset class, since the members' economies and markets differ widely.

Broad MoneyStocks

A measure of the money supply covering currency in circulation plus deposits readily usable for payment or easily converted into means of payment, including savings deposits, small time deposits and retail money market fund shares. In the United States the main such aggregate is M2. It is wider than narrow money, which counts only currency and transaction balances. Central banks track it because it reflects the deposit liabilities created by bank lending, though the link between its growth and later inflation is unstable.

Brokerage CompanyStocksCrypto

A firm licensed to arrange securities transactions for clients, acting as agent to execute orders on their behalf and, when acting as principal, dealing from its own inventory. Revenue comes from commissions, spreads, margin lending, payment for order flow, asset-based fees and interest on client cash. In the United States such firms register with the Securities and Exchange Commission, join the Financial Industry Regulatory Authority and must segregate customer assets, with account protection provided by the Securities Investor Protection Corporation within statutory limits.

Brownfield InvestmentStocks

An investment in which a company enters a market by acquiring or leasing an existing facility and adapting it, rather than building from nothing. It reaches production faster than a greenfield project and brings existing permits, workforce and utility connections, but it carries the site's history: outdated layout, deferred maintenance and, in the original industrial sense, possible contamination requiring remediation. Environmental liability due diligence is therefore central to pricing, since the buyer can inherit clean-up obligations along with the asset.

Budget setStocks

The collection of all consumption bundles a household can afford at given prices with a given income. With two goods it is the triangle bounded by the axes and the budget line, whose slope is the negative of the price ratio and whose position is set by income. A rise in income shifts the line outward without changing its slope, while a change in one price pivots it. Consumer choice theory models demand as the point in this region that reaches the highest attainable indifference curve.

Bullish Abandoned BabyStocksCrypto

A three-candle reversal pattern that can appear after a downtrend. The first candle is a long down candle, the second is a doji that gaps below it and shares no price overlap with either neighbor, and the third gaps back up and closes well into the first candle's range. The isolated doji represents a session in which selling failed to extend and buyers and sellers reached balance. It is rare because two clean gaps are required, and traders generally look for confirmation from volume or a following close. Full guide →

Bundle of RightsStocks

The legal concept that property ownership is a set of separable rights rather than one indivisible thing. The usual list is the right to possess, to control how the property is used, to exclude others, to enjoy it, and to dispose of it by sale, gift or bequest. Rights can be split and sold individually, which is what a lease, an easement, a mineral rights conveyance or a mortgage lien does. Government powers of taxation, eminent domain, police regulation and escheat sit above the whole set.

Business EcosystemsStocksCrypto

A network of organizations that jointly create and deliver a value proposition no member could deliver alone: suppliers, complementors, distributors, developers, standards bodies and customers. Members are formally independent but depend on shared interfaces and on the health of the whole. A firm occupying the coordinating position, often through a platform or a standard, can shape terms across the network and capture a disproportionate share of the value, which is why platform positions attract both premium valuations and competition scrutiny.

Buy the DipsStocks

A practice of adding to a position after a price decline, on the view that the fall is temporary and the longer trend intact. It is mechanically the opposite of momentum trading, and it embeds an assumption that prices mean-revert over the chosen horizon, which holds in some markets and regimes and not others. The risk it carries is asymmetric: repeated purchases into a decline increase position size exactly as the case for the position weakens, so it interacts badly with leverage and with position limits.

Bucket Strategy(time segmentation, bucketing) Stocks

A retirement structure that divides a portfolio into segments by when the money will be spent: near-term spending held in cash and short-duration assets, medium-term needs in bonds, and long-horizon money in equities. The intent is to avoid selling volatile assets to fund spending during a decline.