I: Glossary Terms

I

income stockStocks

A share held mainly for the cash it distributes rather than for price appreciation, typically issued by a mature business with predictable cash flow that returns a large share of profit to holders. Utilities, telecoms and real estate trusts are common examples. The distribution is declared by the board each period and can be reduced or suspended.

issued sharesStocks

Shares that a company has actually distributed to shareholders, including shares later repurchased and held as treasury stock.

institutional ownershipStocks

The share of a company's outstanding stock held by professional managers such as mutual funds, pension plans, endowments, insurers and hedge funds. In the United States, managers above a regulatory asset threshold report long positions quarterly on Form 13F, so the figure is public but lagged and excludes short positions and holdings that are not reportable.

insider ownershipStocks

The percentage of a company's stock held by its directors, officers and beneficial owners above the reporting threshold in Section 16 of the Securities Exchange Act. Those holders must report purchases and sales on Form 4 shortly after each transaction, so changes are visible. A large stake aligns management with outside holders but can also entrench it against removal.

immediate-or-cancelStocks

A time-in-force instruction to execute whatever quantity is available right away and cancel the remainder, leaving nothing resting on the book. Partial fills are accepted. Traders use it to take displayed liquidity without signaling residual interest or leaving an exposed order behind while the market moves away from them.

iceberg orderStocks

A large order split so that only a small visible portion shows on the order book at a time, with the remainder revealed in increments as each visible slice fills.

intrinsic valueStocksOptions

An estimate of an asset's economic worth based on expected cash flows, assets, earnings, or other fundamentals rather than solely its current market price.

income statement(profit and loss statement, P&L) Stocks

A financial statement showing revenue, expenses, gains, losses, and profit over a reporting period.

intangible assetsStocks

Nonphysical assets such as patents, trademarks, software, customer relationships, or acquired technology that meet recognition criteria. Full guide →

interest coverageStocks

A solvency ratio measuring how many times operating profit covers a period's financing expense, usually EBIT divided by that expense. A low reading means a modest decline in profit could leave the company unable to service its borrowings from operations. Variants use EBITDA or subtract capital spending, to reflect the cash actually available rather than accounting profit. Full guide →

invested capitalStocks

The operating capital funded by debt and equity that supports the business, typically derived from balance-sheet items under a specified analytical definition.

inventory turnoverStocks

Cost of goods sold divided by average inventory, estimating how frequently inventory is sold or used during a period.

implied volatilityStocksCryptoOptions

The volatility figure that, entered into an option pricing model, makes the model's value equal the option's traded price. It is the market's forward-looking expectation of how much the underlying will move over the contract's life, quoted on an annualized basis, and it carries no directional information. It typically rises ahead of scheduled events and falls once they pass.

Ichimoku Cloud(Ichimoku Kinko Hyo) StocksCrypto

A multi-line trend and support/resistance system using conversion, base, leading, and lagging lines to assess direction, momentum, and equilibrium. Full guide →

inverse head and shouldersStocksCrypto

The bottoming counterpart of a downtrend reversal, consisting of a trough, a lower trough and a higher trough, with the intervening peaks forming a neckline above. Completion requires a close above that neckline, ideally on expanding volume. The conventional target projects the depth from the lowest trough to the neckline upward from the breakout point.

inverse cup and handleStocksCrypto

The bearish mirror of the rounded-base continuation: a curved top that returns to near a prior trough, followed by a modest upward drift before price breaks lower. The break beneath the drift's low is the confirmation point, and the conventional projection subtracts the depth of the dome from that level. It appears less often than the bullish version.

island reversalStocksCrypto

A formation in which price gaps in one direction, trades for one or more sessions within a range that does not overlap prior prices, then gaps back the other way, leaving that cluster isolated with empty space on both sides. The two gaps mean everyone who transacted inside the island is stranded at prices no longer being visited. Full guide →

impulse waveStocksCrypto

In Elliott Wave analysis, a five-part move in the direction of the larger trend, labeled one through five. Its governing rules are that the second segment never fully retraces the first, the third is never the shortest of the three advancing segments, and the fourth does not overlap the first's territory in the standard form.

inverted hammerStocksCrypto

A candle appearing after a decline, with a small body near the period's low and a long upper shadow roughly twice the body's height or more. It shows buyers pushed price up during the session before it faded back to the bottom. It is treated as a potential bottoming signal only when the following period confirms with a higher close. Full guide →

inside barStocksCrypto

A period whose entire high-to-low range falls within the previous period's range, indicating a contraction in volatility and a pause in directional pressure. Traders reference the enclosing period's high and low as the boundaries whose breach defines the next move, which is why the setup is used to place entries and stops precisely. Full guide →

in-sample testStocksCrypto

Measuring a strategy on the same historical data used to choose its rules and parameters. Results are optimistic by construction, because those settings were selected partly to fit that period, so the figure is a development diagnostic rather than an estimate of future performance. It is meaningful only when paired with a separate holdout evaluation on data the model never saw.

information ratioStocksCrypto

Average active return divided by tracking error, measuring benchmark-relative return per unit of active risk.

initial marginStocksCryptoFutures

The minimum collateral or equity required to open a leveraged position or derivative contract under applicable broker, exchange, or regulatory rules.

in the moneyStocksOptions

A description of an option whose immediate exercise would produce positive intrinsic value: a call struck below the current price of the underlying, or a put struck above it. The premium of such a contract contains both intrinsic value and whatever time value remains. Contracts in this state at expiration are typically exercised automatically once they clear the clearing house threshold.

iron butterflyStocksOptions

A defined-risk strategy combining a short at-the-money straddle with protective wings, usually seeking limited movement around the center strike.

iron condorStocksOptions

A defined-risk four-leg options strategy combining a short put spread and short call spread, typically seeking profit if price remains within a range.

IV rank(IV rank) StocksOptions

A measure locating current implied volatility within its high-low range over a chosen historical window; formulas vary by platform.

IV percentile(IV percentile) StocksOptions

The percentage of observations in a historical window with implied volatility below the current level; implementations vary by data provider.

implied moveStocksOptions

A market-derived estimate of the magnitude of an underlying price move over a period inferred from option prices; calculation methods vary.

IV crush(volatility crush) StocksOptions

A sharp decline in implied volatility after a known event such as earnings, often reducing option premiums even if the underlying price moves.

information asymmetryStocks

A situation where one side of a trade knows something material the other does not, such as a pending large order, an unreleased result, or a better model of value. Market makers respond by widening spreads to charge for the chance of dealing with a better-informed counterparty. Disclosure rules and insider trading law exist to limit the most damaging forms of it.

informed traderStocks

A participant whose orders carry information about future price, whether from research, private analysis, or a faster read of public data. Their trades tend to be followed by price moving in the direction they dealt, which is what market makers try to detect and avoid. Adverse selection cost, embedded in the bid-ask spread, is what liquidity providers charge for that possibility.

industrial productionStocksCrypto

An index of the physical output of manufacturing, mining, and utilities, published monthly in the United States by the Federal Reserve. It measures volume rather than currency value, so price changes do not affect it. It is reported with capacity utilization, the share of productive capacity actually in use, which is watched as a gauge of slack and potential cost pressure.

investment gradeStocks

Investment grade describes a bond or issuer that has received a relatively high credit rating from a major ratings agency, typically BBB-/Baa3 or above, signaling a comparatively low risk of default. Investment-grade bonds generally offer lower yields than lower-rated 'junk' bonds because investors demand less compensation for credit risk, and many institutional funds and mandates are restricted to holding only investment-grade debt. A downgrade below investment-grade status can trigger forced selling by such funds and typically pushes the bond's price down.

isolated marginCrypto

A margin mode where collateral is limited to a specific position or market, containing potential loss to the assigned margin subject to venue rules.

index priceCrypto

A composite spot reference derived from selected external markets and used to value derivatives, funding, or liquidation calculations.

insurance fundCrypto

A reserve established to absorb specified trading, liquidation, smart-contract, or counterparty losses according to a platform's rules.

impermanent lossCrypto

The temporary difference between holding assets in a liquidity pool versus holding them outright, caused by the pool automatically rebalancing as prices move; it becomes permanent only if liquidity is withdrawn while the divergence exists. Full guide →

insider allocationCrypto

The share of token supply assigned to founders, employees, early investors, advisers, or closely connected parties.

initial coin offeringCrypto

A fundraising method in which a project sells newly created tokens directly to the public, historically in exchange for bitcoin or ether, before or alongside building its product. The 2017 wave drew heavy enforcement attention, and regulators in several jurisdictions concluded that many such sales were offerings of securities subject to registration and disclosure rules. Buyers received tokens rather than equity or a claim on assets.

initial exchange offeringCrypto

A token sale conducted through a centralized exchange, which hosts the sale, screens the project, handles participant onboarding and identity checks, and usually lists the token immediately afterward. The venue's involvement provides distribution and some vetting, but it is not an assurance of project quality or regulatory standing. Allocation is often rationed by lottery or by holdings of the exchange's own token.

initial DEX offeringCrypto

A token launch conducted through a decentralized exchange, where the team seeds a liquidity pool and trading opens permissionlessly to anyone with a wallet. There is no gatekeeper or identity check, so listing is fast and open, and there is correspondingly no vetting. Front-running bots, thin starting liquidity, and copycat contracts using similar names are characteristic hazards of the format.

illiquid supplyCrypto

A provider-defined estimate of coins held by entities with low historical spending behavior rather than readily available to trade.

impersonation scamCrypto

Fraud in which the attacker adopts the identity of a trusted party, such as an exchange support agent, a project founder, a well-known trader, or a government official, to extract funds or credentials. Tactics include cloned social accounts with near-identical handles, spoofed sender addresses, and fake support channels that surface in search results above the real one. The request usually funnels toward a single irreversible act: sending assets to a supplied address, or entering a recovery phrase into a lookalike site.

investment contractCrypto

Category of security defined by case law rather than by a statutory list, covering any scheme in which money is invested in a common enterprise with profits expected from the managerial efforts of others. Because the definition is functional, it can capture arrangements with no share certificate at all, including certain token sales and profit-sharing agreements. Classification as one triggers registration and disclosure obligations under United States securities law unless an exemption applies.

illusion of controlStocksCrypto

Belief that one's actions influence an outcome that is substantially determined by chance or by forces outside the actor. In markets it is reinforced by activity: choosing an entry, watching a screen, or adjusting an order feels causal even when the distribution of outcomes is unchanged. It contributes to overtrading, to increasing size after a favorable run, and to treating a process with wide variance as though it were reliably repeatable.

issuerStocks

Legal entity that creates and sells a security to raise capital and that carries the obligations attached to it. For stock the issuer is the company itself, which registers the offering, files periodic disclosures, and declares dividends; for a bond it is the borrower that owes coupons and principal. Once a security trades in the secondary market, transactions occur between investors and raise no money for the issuer, though its disclosure obligations continue.

ISINStocks

A 12-character international identifier assigned to a specific security issue under the International Securities Identification Number standard.

industryStocks

Classification narrower than a sector, grouping companies that make similar products or serve the same market and therefore face comparable cost structures, competition, and demand drivers. Under standard schemes each sector contains several industry groups, which contain industries and then sub-industries. Industry is usually the more informative comparison set for valuation multiples and margin analysis, because companies within one operate under broadly the same economics.

inventoryStocks

Goods held for sale or inputs held for production, recorded as an asset until sold or written down. Full guide →

IPOStocks

Initial public offering, the first sale of a company's shares to public investors, after which the stock trades on an exchange. The issuer files a registration statement with the SEC, underwriters market the deal and build a book of demand, and a price is set before trading begins. The company receives proceeds only on newly issued primary shares, while secondary shares in the deal are sold by existing holders. Insider selling is typically restricted by a lock-up agreement for a period after listing.

IchimokuStocksCrypto

Ichimoku Kinko Hyo, a Japanese charting system that plots several lines to show trend, momentum, and support and resistance at once. Conversion and base lines are midpoints of recent highs and lows over short and medium windows; two leading spans, one the average of those lines and one a longer midpoint, are plotted ahead of price and form the cloud; a lagging span plots the close behind price. Price above the cloud is read as an uptrend, and cloud thickness as the depth of the barrier. Full guide →

ITMStocksOptions

In the money, describing an option that has intrinsic value at the current underlying price: a call struck below the underlying, or a put struck above it. Intrinsic value equals that difference, and the premium is at least that amount plus whatever extrinsic value remains. Finishing in the money by a defined threshold is what triggers automatic exercise under standard clearing rules. It does not by itself mean the position is profitable, since the premium originally paid still counts.

internalizationStocksCrypto

Execution of customer order flow by the broker or an affiliated market maker rather than routing the order to an external displayed venue.

inflationStocksCrypto

Sustained increase in the general price level, meaning each unit of currency buys less than it did before. It is measured by tracking the cost of a fixed or periodically updated basket of goods and services, with the rate quoted as a percentage change over a year or an annualized month. Causes are analyzed as demand pressure, cost shocks, and expectations. It erodes the real value of fixed nominal payments, which is why nominal and real returns differ. Full guide →

immutabilityStocks

Property that records, once written and confirmed, cannot be altered or deleted without detection. On a blockchain it comes from hash linking: each block commits to the previous one, so changing any earlier entry changes every subsequent hash and invalidates the chain unless the attacker redoes all the work or attestations since. It is economic and probabilistic rather than absolute, and it strengthens as more blocks are added on top of the entry.

issuanceStocksCrypto

The creation and distribution of new units of a security or token. A company issues newly created shares or bonds to raise capital, which dilutes existing shareholders. A blockchain issues tokens through block rewards, staking rewards, or scheduled unlocks. Net issuance subtracts whatever was permanently retired over the same period, such as repurchased shares taken into treasury or tokens burned, from the gross amount created.

ICOCrypto

Initial coin offering: a fundraising method in which a project sells newly created tokens directly to the public, usually for an established cryptocurrency, before or alongside launching a product. Buyers receive tokens rather than equity or a debt claim. Regulators in several jurisdictions, including the United States Securities and Exchange Commission, have treated many such offerings as securities offerings depending on how the token was marketed and what buyers were led to expect.

IEOCrypto

Initial exchange offering: a token sale conducted on a centralized exchange, which lists the token and runs the sale, the identity checks, and the distribution to buyers. The exchange takes a fee, and its participation acts as a screening step that a self-hosted sale lacks. Buyers rely on that venue's diligence and custody rather than interacting with the project's contract themselves, which concentrates both the convenience and the counterparty exposure.

IDOCrypto

Initial DEX offering: a token launch run through a decentralized exchange or launchpad contract rather than a company or centralized venue. Buyers swap directly against a pool the project seeds, so price is set by the pool formula and by the order in which transactions arrive. There is usually no gatekeeper reviewing the project, and automated bidders competing for the first blocks can capture much of the early price move.

impulsivityStocksCrypto

Acting on a market decision before evaluating it against a plan, typically triggered by a price move, a headline, or the discomfort of a losing position. It shows up as unplanned entries, position sizes chosen in the moment, and stop orders cancelled while a trade is open. Because each impulsive trade sits outside the tested rule set, its result carries no information about whether the underlying strategy works.

Implementation ShortfallCrypto

The difference between a reference decision price and the realized execution outcome, including delays, spreads, market movement, partial fills, and other execution effects as defined by the measurement method.

Index FundStocksCrypto

A fund designed to track the performance of a specified market index rather than trying to beat it through active stock selection. Full guide →

Insider TradingStocks

Buying or selling a security based on material, nonpublic information, which is illegal when done in breach of a duty of trust or confidence.

IPO (Initial Public Offering)Stocks

The first sale of a private company's shares to the public, after which the stock begins trading on an exchange.

Inactivity LeakCrypto

An Ethereum mechanism that reduces balances of inactive validators during prolonged finality failures so the active majority can eventually restore finality.

Implementation ContractCrypto

The smart contract containing executable logic used behind an upgradeable proxy.

Index TokenCrypto

A token designed to track a basket, strategy, or index of multiple underlying cryptoassets or protocol positions.

Inflationary TokenCrypto

A token whose outstanding supply can increase over time through scheduled issuance, rewards, emissions, or discretionary minting.

Initial Coin Offering (ICO)(ICO) Crypto

A fundraising model in which a project sells newly issued crypto tokens to participants, with legal treatment depending on the facts and jurisdiction.

Initial DEX Offering (IDO)(IDO) Crypto

A token launch or sale conducted through a decentralized-exchange or launchpad mechanism.

Initial Exchange Offering (IEO)(IEO) Crypto

A token sale facilitated through a centralized exchange that lists or distributes the offered asset.

Initial SupplyCrypto

The quantity of token units created or recognized when a network or token launches.

Interest-Bearing TokenCrypto

A token representing a lending or savings position whose exchange rate or balance reflects accumulated interest.

Inverse TokenCrypto

A token designed to rise when a referenced asset falls, usually through derivatives and periodic rebalancing.

Investor AllocationCrypto

The portion of token supply distributed to seed, private, strategic, or other investors.

Index ConstituentCrypto

An exchange or market whose price observations are included in a composite crypto index.

Index ProtectionCrypto

Rules that cap, exclude, or damp abnormal constituent prices to reduce the effect of faulty or manipulated inputs on a reference index.

Index WeightCrypto

The contribution assigned to each constituent market when calculating a composite reference price.

Insurance Fund DepletionCrypto

A decline in a derivatives venue's loss-absorbing reserve that can increase the chance of socialized losses or auto-deleveraging under extreme conditions.

Inverse FuturesCrypto

A derivative quoted in fiat terms but margined and settled in the underlying cryptoasset, causing collateral value to vary with the asset price.

ImmunefiCrypto

A well-known crypto-focused bug-bounty platform; as a glossary entry it should be treated as an ecosystem example rather than a generic security concept.

Inflation Attack (Vault)Crypto

An attack on share-based vault accounting where an early depositor manipulates share value so later depositors receive too few shares or lose value.

InscriptionCrypto

Data embedded or referenced through a blockchain transaction and indexed as a distinct digital artifact, notably in Bitcoin Ordinals.

Insider WalletCrypto

A wallet attributed to founders, team members, early investors, market makers, or closely connected parties.

Integer OverflowCrypto

A numeric error where a value exceeds its type's maximum and wraps or behaves unexpectedly; modern smart-contract languages may include automatic checks.

Integer UnderflowCrypto

A numeric error where subtraction goes below the supported minimum and wraps or behaves unexpectedly; modern languages may automatically revert.

IP AllowlistingCrypto

Restricting API or account access to specified network addresses as an additional security control.

In-Range LiquidityCrypto

A concentrated-liquidity position whose configured price interval currently contains the market price and is therefore actively quoting both sides according to the AMM.

Interest Rate Model(interest-rate model) Crypto

A rule or formula that sets DeFi borrowing and lending rates, commonly as a function of market utilization.

InvariantCrypto

A mathematical condition an AMM or DeFi protocol attempts to preserve across valid state transitions, such as a reserve-product relationship.

Isolation ModeCrypto

A lending risk control that restricts which assets or debt types can be used together when a higher-risk collateral asset is supplied.

ImpairmentStocks

An accounting write-down recognized when the carrying value of an asset exceeds the amount recoverable under applicable accounting rules.

Inorganic GrowthStocks

Growth attributable mainly to acquisitions, mergers, or other externally added businesses rather than expansion of existing operations.

Interest Coverage RatioStocks

A measure of ability to service interest expense, commonly EBIT or EBITDA divided by interest expense depending on the chosen formula.

Interest ExpenseStocks

The accounting cost of borrowed money and other financing obligations during a reporting period. Full guide →

Interest IncomeStocks

Income earned on cash, securities, loans, or other interest-bearing assets.

Internal Rate of Return (IRR)(IRR) Stocks

The discount rate that sets the net present value of a defined series of cash flows to zero, subject to known limitations with unconventional cash flows.

IBC(Inter-Blockchain Communication) Crypto

Inter-Blockchain Communication: a protocol family in the Cosmos ecosystem for authenticated communication between compatible sovereign chains.

Inbound LiquidityCrypto

Payment-channel capacity available for receiving funds through the network.

Inclusion ListCrypto

A protocol mechanism allowing proposers or other participants to require that specified pending transactions be included by block builders when valid and feasible.

IntentCrypto

A signed statement of a desired outcome, such as receiving a specific asset on another chain, while allowing solvers to determine the execution path.

Intent-Based TradingCrypto

A trading model where users specify desired outcomes and competing solvers or market makers construct and execute transactions on their behalf.

Internal TransactionCrypto

A block explorer term for value movement caused by smart-contract execution rather than a top-level signed transaction; it is not a distinct consensus-layer transaction.

Interoperability ProtocolCrypto

Infrastructure enabling applications, assets, or messages on different blockchains to communicate under a defined verification model.

Imbalance FeedStocksCrypto

A market-data feed publishing auction demand, indicative prices, paired shares, and buy or sell imbalance information before an auction.

Immediate-or-Cancel (IOC)(IOC) StocksCrypto

An order instruction requiring immediate execution of any available quantity, with the unfilled remainder canceled.

Implementation Shortfall Algorithm(IS algorithm) StocksCrypto

An execution algorithm designed to balance market impact and timing risk relative to an arrival or decision-price benchmark.

Indicative Match PriceStocksCrypto

The estimated auction price that would maximize or otherwise determine matched volume under the venue's auction rules if the auction ended at that moment.

Indicative PriceStocksCrypto

An estimated price at which an auction, offering, or market would clear based on current available orders or indications.

Information LeakageStocksCrypto

The unintended revelation of a trader's intentions through orders, quotes, venue choices, timing, or execution patterns, potentially worsening future fills.

Inside MarketStocksCrypto

The market's current best bid and best ask, defining the narrowest displayed quoted spread.

Inventory RiskStocksCrypto

The risk that a market maker or dealer loses money because prices move while it holds an unwanted net position accumulated from customer trades.

IPO CrossStocksCrypto

A price-discovery auction used by an exchange to open trading in a newly listed security after indications and orders have accumulated.

Implied DistributionStocksOptions

A market-implied distribution of future prices derived from option prices under specified modeling and arbitrage assumptions.

Implied Volatility (IV)(IV) StocksOptions

The volatility input that makes an option-pricing model match the option's market price, reflecting market-implied uncertainty under model assumptions.

In-the-Money (ITM)(ITM) StocksOptions

An option with positive intrinsic value based on the current underlying price relative to its strike.

IV ExpansionStocksOptions

An increase in implied volatility that raises option extrinsic value, all else equal.

Idiosyncratic Risk(specific risk) StocksCrypto

Security-specific risk that is not explained by broad systematic market factors and can often be diversified across many holdings.

In-Sample DataStocksCrypto

Data used to design, fit, or select a strategy or model.

InterceptStocksCrypto

The regression constant representing the predicted dependent variable when all included explanatory variables equal zero.

Inverse Volatility WeightingStocksCrypto

Allocating more weight to lower-volatility assets and less to higher-volatility assets, typically in proportion to the inverse of estimated volatility.

Indication of Interest (IOI)(IOI) Stocks

A nonbinding expression of potential demand for a security, offering, block trade, or other transaction.

IPO Roadshow(roadshow) Stocks

A series of investor presentations used by an issuer and underwriters to explain an offering and assess institutional demand before pricing.

Imbalance ZoneStocksCrypto

A broad trader term for a price region showing uneven buying and selling activity, with exact definitions varying across volume, order-flow, and ICT methodologies.

Impulse MoveStocksCrypto

A strong directional price move with relatively little overlap or retracement, often associated with aggressive order flow or new information.

Indicator ConfluenceStocksCrypto

Agreement among two or more indicators, which may add confidence only if the indicators are not simply redundant transformations of the same data.

Indicator ParameterStocksCrypto

A configurable setting such as period length, smoothing factor, threshold, or standard-deviation multiplier used in an indicator calculation.

Invalidation LevelStocksCrypto

A price or market condition that, if reached, contradicts the premise for a trade or analysis and signals that the original setup no longer holds.

Index OptionStocksOptions

An option whose underlying is a stock index rather than an individual security; broad-based index options (such as those on the S&P 500) are typically European-style, cash-settled, and taxed as Section 1256 contracts. Full guide →

inverted yield curveStocksCrypto

A yield curve shape in which shorter-maturity bond yields exceed longer-maturity yields, historically a reliable leading indicator that markets expect the central bank to cut rates in response to a slowing economy or recession. Full guide →

initial jobless claims(initial claims) StocksCryptoOptionsFutures

The weekly count, published by the U.S. Department of Labor, of individuals filing for unemployment insurance benefits for the first time after losing a job; as one of the most timely labor-market data points available, a sustained rise in initial claims is an early warning sign of labor-market deterioration. Full guide →

Interest Rate SwapStocksFutures

An over-the-counter agreement in which two counterparties exchange interest payment streams on a common notional principal, typically swapping a fixed rate for a floating reference rate.

ISDA Master AgreementStocksFutures

A standardized legal contract published by the International Swaps and Derivatives Association that governs the terms, default provisions, and netting rights for over-the-counter derivative transactions between two parties.

Incremental VaRStocksOptionsFuturesCrypto

The change in a portfolio's total Value at Risk that results from adding or removing a specific position, isolating that position's contribution to overall portfolio risk. Full guide →

Inter-Commodity SpreadFutures

A futures spread position that is simultaneously long and short related but distinct underlying commodities or instruments (e.g., long corn futures and short wheat futures) to trade the price relationship between them rather than the outright direction of either.

Inverted MarketFutures

A futures market in backwardation, where nearer-dated contracts trade at a premium to later-dated contracts, typically signaling tight near-term supply or strong immediate demand for the underlying commodity relative to expectations further out.

Inverted ExchangeStocks

An exchange whose fee schedule pays a rebate to liquidity-taking market orders and charges a fee to liquidity-adding limit orders, the reverse of the standard maker-taker model, used by some venues to attract order flow. Full guide →

In-Kind Redemption(in-kind creation) Stocks

The process by which an authorized participant exchanges a creation unit of ETF shares for the underlying basket of securities rather than cash, a mechanism that helps ETFs avoid triggering capital gains distributions. Full guide →

Index ETF(passive ETF) Stocks

An ETF designed to replicate the performance of a specified market index by holding the same securities in similar proportions, rather than relying on manager discretion to pick investments. Full guide →

Inverse ETF(short ETF, bear ETF) Stocks

An ETF that uses derivatives to deliver the opposite of an underlying index's daily return, allowing investors to profit from a decline without selling short directly, with returns reset and compounded each trading day. Full guide →

IRA(Individual Retirement Account) Stocks

A tax-advantaged personal retirement account that lets an individual set money aside for retirement outside of an employer plan. The umbrella term covers Traditional and Roth variants (differing in when contributions and withdrawals are taxed) as well as employer-facilitated small-business versions like the SEP IRA and SIMPLE IRA. Annual contribution limits and eligibility rules are set by the IRS and adjusted periodically.

Inherited IRA(Beneficiary IRA) Stocks

An IRA opened to hold assets inherited from a deceased IRA owner's account. Distribution rules differ sharply by the beneficiary's relationship to the original owner: a surviving spouse can typically treat the account as their own, while most non-spouse beneficiaries must fully distribute the account within a set number of years under current IRS rules rather than stretching withdrawals over their own life expectancy. Full guide →

impermanent loss protection(IL protection) CryptoDeFi

A feature some liquidity protocols offer that compensates liquidity providers, fully or partially, for impermanent loss they experience relative to simply holding the deposited tokens, usually funded from protocol fees or token emissions. Full guide →

isolated margin poolCryptoDeFi

A lending market design that separates specific asset pairs or listings into their own contained pool, so risk from a volatile or exploited asset stays confined to that pool instead of threatening the protocol's main lending markets. Full guide →

impermanent loss hedgeCryptoDeFi

A strategy or financial instrument liquidity providers use to offset potential impermanent loss, such as taking an offsetting derivatives position, using single-sided or stablecoin-only pools, or relying on protocols that provide built-in loss protection. Full guide →

infinite approval(unlimited approval) Crypto

A token allowance set to the maximum possible value rather than a specific amount, commonly used by dApps to avoid asking users to re-approve for every transaction, at the cost of leaving an unbounded standing permission on the wallet.

immutable contractCryptoDeFi

A smart contract deployed without any upgrade mechanism, meaning its code and logic can never be changed after deployment, so any bug found later can only be fixed by deploying an entirely new contract and migrating users to it. Full guide →

Incentive Stock Option (ISO)(ISO) Stocks

An employer stock option that qualifies for preferential tax treatment under IRS rules: no ordinary income is recognized at exercise, and if the shares are held long enough to meet the required holding periods, the entire gain at sale is taxed as long-term capital gain rather than compensation income. Full guide →

Industrial Real EstateStocks

Industrial real estate covers property used for manufacturing, warehousing, and logistics, including distribution centers, fulfillment warehouses, and light-manufacturing facilities. Demand has grown with e-commerce and supply-chain reshoring, drawing investor interest to logistics facilities near population centers and transportation hubs. Leases are frequently long-term net leases, giving owners relatively predictable income compared with retail or office space.

IP-Backed Financing(intellectual property-backed financing) Stocks

IP-backed financing is a loan or other financing arrangement in which a company's intellectual property, such as patents, trademarks, or copyrights, and their associated royalty or licensing income, serves as collateral rather than traditional hard assets like real estate or equipment. It lets IP-rich but asset-light companies (software, pharmaceutical, and media firms, for example) raise capital against future licensing revenue, but valuing IP collateral is inherently more subjective and volatile than valuing physical assets, since it depends on legal enforceability and future market demand.

Intellectual Property Valuation(IP valuation) Stocks

Intellectual property valuation is the process of estimating the monetary worth of a patent, trademark, copyright, or other IP asset, typically using one or a blend of three approaches: the income approach (discounting projected future royalty or licensing cash flows), the market approach (comparing recent sales or licenses of similar IP), and the cost approach (estimating the cost to recreate the asset). Because IP has no physical form and often no active trading market, valuations are more judgment-driven and can vary significantly between appraisers, especially for early-stage patents or uncertain future licensing demand.

InfrastructureStocks

Infrastructure refers to the physical systems and facilities that support a modern economy, including transportation (roads, airports, ports), utilities (power, water), communications (cell towers, data centers, fiber networks), and energy transport (pipelines). As an investment asset class, infrastructure is prized for producing long-duration, often regulated or contracted cash flows that tend to be less cyclical than typical corporate earnings, making it attractive to income-focused and inflation-sensitive investors.

Infrastructure FundStocks

An infrastructure fund is a pooled investment vehicle, either publicly traded (a mutual fund or closed-end fund) or private (typically a private equity fund for institutional and accredited investors), that invests in infrastructure assets such as toll roads, utilities, pipelines, and communications infrastructure. Funds let investors access a diversified portfolio of infrastructure assets and professional management without directly owning or operating individual projects, though private infrastructure funds are illiquid and typically require long multi-year capital commitments.

Infrastructure ETFStocks

An infrastructure ETF is an exchange-traded fund that holds a basket of publicly traded infrastructure-related companies, such as utilities, pipelines, toll-road operators, airports, and communications infrastructure REITs, giving investors diversified, liquid exposure to the infrastructure sector through a single exchange-listed security. Infrastructure ETFs trade throughout the day like stocks and typically track a global or regional infrastructure index.

InsuranceStocks

Coverage that protects a collectible or tangible asset against loss, theft, or damage, typically requiring a current appraisal to set the insured value. Standard homeowner's policies often cap or exclude high-value collectibles, making specialist collectibles/fine-art insurance policies necessary for meaningful coverage.

IlliquidityStocks

The condition of an asset being difficult to sell quickly without accepting a significant price concession, due to a small pool of interested buyers, long marketing timelines, and lack of a continuous public market. Most collectibles and tangible assets are highly illiquid compared with publicly traded stocks and bonds, which trade continuously with narrow bid-ask spreads.

Investment-Grade WineStocks

Fine wine from a small set of top-tier producers and regions (chiefly Bordeaux first-growths, top Burgundy, Champagne, and select Italian and Californian labels) with an established secondary market, critic scores, and price history sufficient to support investment-oriented trading. Investment-grade status depends on a track record of consistent demand and resale liquidity: most wine, even good wine, does not qualify.

in-service withdrawalStocks

A distribution taken from an employer retirement plan while the participant is still actively employed by the plan sponsor, as opposed to a distribution triggered by separation, retirement, or death. Plans are not required to allow in-service withdrawals, and where permitted they are often restricted by age, source of funds, such as only employer match or after-tax contributions, or a hardship requirement.

in-service rolloverStocks

A transfer of funds from an employer retirement plan to an IRA or another eligible retirement account while the employee remains employed at the plan sponsor, available only if the plan document specifically permits it, often limited to participants who have reached a certain age, such as 59½. It differs from a standard distribution because the funds move directly between tax-advantaged accounts rather than being paid to the participant, avoiding current taxation.

IRA contributionStocks

Money deposited into an individual retirement account by the account owner, up to the annual IRS dollar limit shared across all of a person's traditional and Roth IRAs combined, as long as they have qualifying earned income at least equal to the contribution. Contributions for a given tax year can be made any time up until the individual's tax-filing deadline for that year, not just by December 31.

IRA contribution limitStocks

The maximum total amount an individual may contribute across all of their traditional and Roth IRAs combined in a given tax year, set annually by the IRS and periodically adjusted for inflation, with an additional catch-up amount allowed starting at age 50. The limit applies per person, not per account, so someone with both a traditional and a Roth IRA must split the same combined limit between them.

IRA deductionStocks

The reduction in taxable income allowed for a contribution to a traditional IRA, which is fully deductible for taxpayers not covered by an employer retirement plan but phases out based on modified adjusted gross income for those who are, or whose spouse is, covered by one. Roth IRA contributions are never deductible, since they are funded with after-tax dollars in exchange for tax-free qualified withdrawals later.

IRA basisStocks

The cumulative amount of nondeductible, after-tax contributions made to a traditional IRA, tracked over the account's lifetime on IRS Form 8606, which represents the portion of future withdrawals or conversions that will not be taxed again. Because the pro-rata rule aggregates all of a person's traditional, SEP, and SIMPLE IRAs for tax purposes, basis in one IRA affects the taxable percentage of a distribution or conversion from any of them.

indirect rolloverStocks

A retirement account transfer in which the account owner personally receives the distributed funds and must redeposit the full amount into another eligible retirement account within 60 days to avoid taxation and possible penalty. For employer-plan distributions, the plan is required to withhold 20% for taxes before paying out, meaning the owner must come up with that withheld amount from other funds to complete a full rollover and avoid it being treated as a taxable withdrawal.

immediate annuityStocks

An annuity that begins making payouts to the owner within about a year of purchase, often within the first month, funded with a single lump-sum premium rather than a series of contributions. It is used primarily to convert a lump sum, such as a retirement account balance, into predictable income right away, trading liquidity and growth potential for guaranteed cash flow.

indexed annuityStocks

An annuity that credits interest based on the performance of a market index, such as the S&P 500, subject to a cap, participation rate, or spread that limits how much of the index's gain the owner actually receives, while typically guaranteeing a minimum floor, often 0%, so principal isn't lost to market declines. It sits between a fixed annuity's guaranteed rate and a variable annuity's full market exposure, offering some upside potential with downside protection.

indexed universal life(IUL) Stocks

A permanent life insurance policy that credits interest to the cash value based on the performance of a market index, such as the S&P 500, subject to a cap or participation rate on the upside and a floor, commonly 0%, that protects the credited interest from index declines, similar in structure to a fixed indexed annuity. IUL policies are more complex than traditional whole or universal life, with cap rates, participation rates, and policy charges that can change over time and materially affect long-term illustrated versus actual performance.

inheritanceStocks

Property, money, or other assets received by an heir or beneficiary from a deceased person's estate, either through a will, a trust, or, absent a will, state intestacy law. Most inherited assets are not subject to federal income tax to the recipient, but inherited retirement accounts like a traditional IRA generally carry the original owner's deferred tax liability, and other inherited assets typically receive a step-up in cost basis to fair market value at death, which can eliminate embedded capital gains for the heir.

irrevocable trustStocks

A trust that, once established, generally cannot be altered, amended, or revoked by the grantor without the consent of the beneficiaries or a court, meaning the grantor permanently gives up ownership and control of the transferred assets. In exchange for that loss of control, assets properly transferred to an irrevocable trust are typically removed from the grantor's taxable estate and can receive greater protection from creditors and estate tax than assets in a revocable trust.

investment-grade bondStocks

An investment-grade bond is a corporate or government bond rated Baa3/BBB- or higher by major credit rating agencies (Moody's, S&P, or Fitch), reflecting a relatively low perceived risk of default. Investment-grade bonds generally offer lower yields than high-yield (junk) bonds because investors accept less compensation for lower credit risk, and many institutional investors (pension funds, insurers) are restricted to holding only investment-grade debt. A downgrade below this threshold, into high-yield territory, can trigger forced selling by such investors and a sharp price decline.

interest-rate riskStocks

Interest-rate risk is the risk that a bond's market value falls as prevailing interest rates rise, because existing fixed coupons become less attractive relative to newly issued bonds paying higher rates. Longer-maturity and lower-coupon bonds carry more interest-rate risk, as measured by duration, since more of their value is tied up in cash flows further in the future. Investors who hold a bond to maturity avoid realizing this price risk, but it matters for anyone who might need to sell before maturity or who is marking a portfolio to market.

interest rateStocks

An interest rate is the percentage of a principal amount charged by a lender or paid to a depositor, typically expressed as an annual rate. For savings products, the stated (nominal) interest rate does not account for compounding, which is why deposit accounts also disclose annual percentage yield (APY) to reflect the actual effective return earned. Interest rates on deposit accounts, CDs, and short-term investments generally move with broader monetary policy, particularly the federal funds rate set by the Federal Reserve.

issuer credit riskStocks

Issuer credit risk in the context of structured notes is the risk that the bank or financial institution that issued the note defaults or becomes insolvent, in which case the investor can lose some or all of their investment regardless of how the underlying reference asset performed. Structured notes are unsecured debt obligations of the issuer, not deposits or insured securities, so principal protection, buffer, and coupon features are only as reliable as the issuing bank's ability to pay. Investors evaluating a structured note should assess the issuer's credit rating separately from the payoff structure itself, since a highly protective note structure offers little comfort if the issuer fails.

investment incomeStocks

Investment income is money earned from holding or selling financial assets, including interest, dividends, capital gains, and rental income from real estate holdings, as opposed to income earned from employment or active business operations. For tax purposes, investment income is generally taxed differently than wages: qualified dividends and long-term capital gains typically receive preferential tax rates, while interest income and short-term gains are usually taxed as ordinary income. The IRS also applies a Net Investment Income Tax (NIIT) surtax to certain investment income above specific income thresholds.

inflation hedgeStocks

An inflation hedge is an investment expected to maintain or increase its real value during periods of rising inflation, offsetting the erosion of purchasing power that inflation causes to cash and fixed-rate bonds. Common inflation hedges include TIPS, I bonds, real estate, commodities, and, to varying and debated degrees, equities, since their effectiveness differs depending on the type and duration of the inflationary period. No asset perfectly and consistently hedges inflation in all environments; TIPS and I bonds are structurally designed to do so through explicit CPI-linked adjustments, while other asset classes' inflation protection is more indirect and historically inconsistent.

institutional investorStocks

An organization (such as a pension fund, endowment, insurance company, bank, or mutual fund) that pools and invests large sums of money on behalf of others, subject to less individual-investor protection than retail investors under securities law. Institutional investors typically qualify automatically as accredited investors and often meet qualified purchaser or qualified institutional buyer thresholds, giving them access to a wider range of private and structured investments.

Impact InvestingStocks

Investing made with the explicit intention to generate measurable positive social or environmental impact alongside a financial return, distinguishing it from ESG integration (which primarily manages risk) and SRI (which primarily excludes). Impact investors typically set impact objectives up front, track outcomes against them, and report on both financial and non-financial performance.

Index Fund vs. ETF(index fund vs ETF) Stocks

Both index funds and index ETFs aim to replicate a benchmark's performance, but a traditional index mutual fund is bought and sold at end-of-day NAV directly from the fund company while an index ETF trades intraday on an exchange like a stock. Index ETFs generally have a slight edge in tax efficiency and often lower minimums, while index mutual funds can support automatic recurring investments and fractional dollar-based purchases more seamlessly at some brokerages.

International ETF(foreign ETF) Stocks

An ETF that holds stocks or bonds of companies based outside the investor's home country, ranging from broad developed- or emerging-market funds to single-country or regional strategies. International ETFs add currency risk on top of the underlying market risk, since returns to a US-dollar-based investor are affected by movements in the foreign currency relative to the dollar unless the fund is currency-hedged.

Indicative NAV(IIV, intraday indicative value, IOPV) Stocks

An estimate of an ETF's per-share net asset value calculated and disseminated roughly every 15 seconds throughout the trading day, based on the last known prices of the fund's underlying holdings. It gives traders a real-time reference point for whether the ETF's market price is trading at a premium or discount to its underlying assets, but it is an estimate, not the official NAV, which is calculated once at day's end.

Index RebalancingStocks

The periodic process by which an index provider adjusts the weights of a benchmark's existing constituents to reflect updated share counts, float, or methodology inputs, without necessarily adding or removing companies. Because index funds and ETFs must trade to match these weight changes on the announced effective date, index rebalancing creates a predictable, observable wave of buying and selling in the affected stocks.

Index ReconstitutionStocks

The periodic review in which an index provider adds or removes companies from a benchmark's constituent list: for example, when a stock no longer meets an index's market-cap, liquidity, or sector criteria. Reconstitution is a distinct event from routine index rebalancing: rebalancing adjusts weights among existing members, while reconstitution changes membership itself, and both can move affected stocks' prices as index funds trade to match.

Investment Adviser(investment advisor) Stocks

A person or firm that is compensated for providing advice about securities and is legally required to register with the SEC or a state securities regulator, depending on assets managed. Federal securities law spells the term 'adviser,' while 'advisor' is the common general-usage spelling for the same role; both refer to a professional who owes clients a fiduciary duty under the Investment Advisers Act of 1940.

Investment Factor(CMA, conservative minus aggressive) Stocks

A factor from Fama and French's five-factor asset pricing model (denoted CMA, for 'conservative minus aggressive') that captures the historical tendency of companies that invest their assets conservatively (low asset growth) to outperform companies that invest aggressively (high asset growth). It is one of the two factors, alongside the profitability factor, added in 2015 to the earlier Fama-French three-factor model of market, size, and value. Full guide →

Impact Measurement(impact measurement and management, IMM) Stocks

The process of tracking, quantifying, and reporting the actual social or environmental outcomes an investment produces, as distinct from simply stating an intention to have impact. Frameworks such as the Global Impact Investing Network's IRIS+ system provide standardized metrics (e.g., tons of CO2 avoided, jobs created) so impact investors can compare outcomes across investments and hold managers accountable to their stated goals.

Interest-Rate Differential(Rate Differential) Stocks

The interest-rate differential is the gap between the interest rates set by two countries' central banks, expressed for a given currency pair. It is a core driver of currency valuation and the basis for carry-trade strategies, since capital tends to flow toward higher-yielding currencies, all else equal.

Index Futures(Stock Index Futures, INDEX FUTURE) FuturesOptionsStocks

Index futures are standardized futures contracts whose value tracks a stock market index, such as the S&P 500 or Nasdaq-100, allowing traders to gain or hedge broad market exposure without buying every underlying stock. Most equity index futures are cash-settled rather than physically delivered. No shares change hands: gains and losses are exchanged in cash daily through the clearing house, and the contract settles at expiry against a special calculation of the index.

Interest-Rate FuturesFutures

Interest-rate futures are standardized contracts based on the future value of a debt instrument or interest-rate benchmark, such as Treasury bonds, Treasury notes, or SOFR. They are used to hedge or speculate on the direction of interest rates and are among the most heavily traded futures products by institutional investors.

Income Strategy(Options Income Strategy) OptionsStocks

An income strategy is an options approach used to generate regular cash flow from a portfolio, typically by selling options premium against stock or cash holdings. Common examples include covered calls, cash-secured puts, and credit spreads, which trade some upside potential or downside protection for steady premium income.

International Equity(Foreign Equity, International Stock) Stocks

International equity is stock in companies headquartered and operating outside an investor's home country. Investors typically access international equity through direct foreign-listed shares, ADRs/GDRs, or international mutual funds and ETFs, and it introduces currency risk, geopolitical risk, and differing regulatory and accounting standards not present in domestic-only portfolios.

Individual Ownership(Individual Account, Sole Ownership) Stocks

Individual ownership is a brokerage or investment account held in the name of a single person, who has sole authority to make decisions and sole legal claim to the assets. Upon the owner's death, individually owned assets without a beneficiary designation typically pass through probate rather than transferring automatically.

Investment Impersonation(Broker Impersonation Scam, Regulator Impersonation Scam) Stocks

Investment impersonation is a fraud pattern in which a scammer poses as a real, registered brokerage firm, investment adviser, or financial regulator to gain a victim's trust, often using a cloned website, spoofed phone number, or forged credentials. FINRA and the SEC regularly issue alerts naming real firms whose identities have been misappropriated by fraudsters in this way.

Inflation Risk(Purchasing Power Risk) Stocks

Inflation risk is the risk that rising prices will erode the purchasing power of an investment's future cash flows or returns, even if its nominal value grows. Fixed-income investments with long maturities and fixed coupon payments are especially exposed, since their payments do not adjust for inflation.

Income ReturnStocks

Income return is the portion of an investment's total return generated from cash income, such as dividends or interest payments, separate from any change in the asset's price (capital return). Comparing income return to price return helps investors understand how much of a portfolio's performance comes from steady cash flow versus market appreciation.

Illiquid AssetStocks

An illiquid asset is an asset that cannot be quickly sold or converted to cash without accepting a discount to its estimated market value, often because it trades infrequently or has few interested buyers. Real estate, private equity, certain collectibles, and shares of non-traded funds are common examples.

ISA(Individual Savings Account) Stocks

An Individual Savings Account (ISA) is a UK tax-advantaged wrapper that lets residents hold cash or investments free of income tax and capital gains tax up to an annual allowance set by HM Revenue & Customs. Variants include the Cash ISA, Stocks & Shares ISA, Lifetime ISA, and Junior ISA, each with its own eligibility rules and permitted uses.

Interval FundStocks

An interval fund is a type of closed-end fund registered under the Investment Company Act of 1940 that offers to repurchase a fixed percentage of its outstanding shares from investors at set intervals, such as quarterly, rather than allowing daily redemptions like a mutual fund. This structure lets the fund hold less liquid assets, such as private credit or real estate, while still offering periodic, though limited, liquidity to investors. Full guide →

Invoice Factoring(Accounts Receivable Factoring, Factoring) Stocks

Invoice factoring is a form of specialty finance in which a business sells its outstanding customer invoices (accounts receivable) to a factoring company at a discount in exchange for immediate cash, rather than waiting for customers to pay on normal terms. The factoring company then collects payment directly from the business's customers and, from an investor's perspective, earns its return from the discount between the price paid for the invoices and their face value.

income investingStocks

A cross-asset investment strategy focused on generating regular cash income from a portfolio, drawing on sources such as dividend-paying stocks, bond interest, real estate investment trust (REIT) distributions, and other yield-bearing holdings, rather than focusing primarily on price appreciation. Full guide →

index investingStocks

An investment philosophy centered on holding diversified, market-tracking funds, most often index funds or exchange-traded funds, rather than selecting individual securities or actively managed funds in an attempt to outperform a benchmark. Index investing is closely related to passive investing but specifically emphasizes tracking a defined market index rather than passive management in general. Full guide →

index triggerStocks

An index trigger is a payout condition in a catastrophe bond or reinsurance contract that keys off a published measure rather than the actual losses of the protected insurer. Industry loss triggers reference an aggregate estimate of insured damage from a reporting agency, while parametric triggers reference a physical measurement such as wind speed, earthquake magnitude or storm track. The design settles quickly and gives investors a variable they can model independently. It leaves the insurer with basis risk, since its own losses may differ from what the index reports.

insurance brokerStocks

An insurance broker arranges cover on behalf of the buyer, surveying the market, negotiating terms with several insurers and often assisting with claims. That differs from an agent, who represents one or more insurers and can bind cover on their behalf. Brokers are typically paid by commission deducted from the premium, sometimes supplemented by a fee agreed with the client or by contingent compensation tied to volume or profitability, which creates a conflict that disclosure rules in most jurisdictions require them to reveal.

International Monetary Fund(IMF) StocksCrypto

The International Monetary Fund is the multilateral institution established at Bretton Woods in 1944 to promote exchange rate stability and orderly balance of payments adjustment. Member countries subscribe quotas that determine both their voting power and their access to financing, and the Fund lends to members facing external payment difficulties on conditions negotiated in a program. It also conducts annual surveillance of each member economy under Article IV and publishes global economic forecasts. Its conditionality has been persistently contested as too austere by borrowing countries.

intraday limitStocksCrypto

An intraday limit caps the exposure a trading desk, a client account or a clearing member may run at any point during the session, as distinct from an overnight limit measured at the close. Banks apply them to dealer positions, to settlement and payment exposure and to credit extended within the day, while brokers apply them to margin accounts through pre-trade risk checks that block orders once the ceiling is reached. They exist because a position that is flat at the close can still have carried very large risk at midday.

investing cash flowStocks

Investing cash flow is the section of the cash flow statement recording money spent on and received from long-lived assets and investments. Outflows include capital expenditure on property and equipment, acquisitions of businesses and purchases of securities; inflows include proceeds from selling those assets and maturing investments. It is normally negative at a growing company because it is buying productive capacity. Read alongside operating cash flow, it shows how much of the cash the business generated is being reinvested rather than distributed.

investment analystStocks

An investment analyst researches securities, industries or economies and produces the estimates and recommendations that inform buying and selling. Sell-side analysts work at brokers and publish research covering an assigned sector, with earnings models, price targets and ratings distributed to institutional clients. Buy-side analysts work inside asset managers and produce internal work that only their own portfolio managers see. Regulations adopted after the 2000s research settlements separate research from investment banking and require disclosure of conflicts and of the distribution of ratings.

Imputed InterestStocks

Imputed interest is interest that tax law treats as having been paid even though little or none actually changed hands. It arises on below-market loans, on zero-coupon and original issue discount instruments, and on some installment sales. The Internal Revenue Service publishes applicable federal rates each month, and where a loan charges less than the relevant rate, the difference is treated as interest income to the lender and may also be recharacterized as a gift or as compensation depending on the relationship between the parties.

Incentive Stock OptionsStocks

Incentive stock options are employee options that meet the statutory conditions in the Internal Revenue Code and therefore receive different tax treatment from ordinary nonqualified options. No regular income tax is due at exercise, and if the shares are held long enough after both grant and exercise the entire gain is taxed as long-term capital gain on sale. The spread at exercise is nonetheless an adjustment for the alternative minimum tax, which can create a liability in a year when no shares were sold. Only employees may receive them, subject to limits set in the statute.

Industry Life Cycle AnalysisStocks

Industry life cycle analysis places a sector in one of several stages and draws conclusions about margins, competition and capital needs from that position. In the introduction stage demand is small and losses are common; in growth, revenue compounds quickly and new entrants arrive; in shakeout and maturity, growth slows, weaker competitors exit and cash generation improves; in decline, volume falls and consolidation follows. The framework guides which valuation approach fits and what a reasonable terminal growth assumption looks like, though technology shifts can reset a mature industry back to growth.

InvestmentStocks

An investment is the commitment of money today to an asset expected to produce income or increase in value over time. Return can arrive as cash flow, such as interest, dividends or rent, as appreciation in price, or as both. What distinguishes it from consumption is the deferral of use, and what distinguishes it from speculation is a greater reliance on the underlying cash flows rather than on price movement alone. Every investment trades expected return against risk, liquidity and the length of time capital is tied up.

Investment BankStocksCrypto

An investment bank helps companies, governments and institutions raise capital and execute transactions rather than taking retail deposits. Its core lines are underwriting new share and bond issues, advising on mergers, acquisitions and restructurings, making markets and trading securities, and providing prime brokerage and research to institutional clients. Revenue comes from fees, spreads and trading results rather than net interest on a loan book. Rules adopted after the research and accounting scandals of the early 2000s require information barriers between advisory teams and public-facing research and trading.

IRA rolloverStocks

Moving retirement money from a qualified employer plan or an IRA into another eligible retirement account without the transfer counting as a taxable distribution. A direct rollover sends assets custodian to custodian. An indirect rollover pays the account holder first, who must redeposit the full amount including any tax withheld within the period the Internal Revenue Code allows, or the shortfall becomes taxable. Frequency limits and eligibility rules are set by the IRS.

indexStocks

A rules-based measurement of a market or segment, built from a defined universe, a selection rule, and a weighting scheme, then maintained through scheduled rebalances. The level itself is a statistic and cannot be bought, so funds track it by holding the constituents. Because the provider writes the rules, two indexes covering the same nominal market can differ materially in what they hold and in how concentrated the largest positions become.

index mutual fundStocks

A mutual fund holding the constituents of a published index at their index weights rather than selecting securities. Investors buy and sell at the net asset value struck once each day after the market closes, dealing with the fund itself rather than on an exchange. Costs are low because there is no research process, and tracking difference against the index comes mainly from fees, uninvested cash, and rebalancing trades.

Independent SponsorStocks

An independent sponsor is a buyer who identifies and negotiates an acquisition first, then raises the equity for that specific deal from investors, rather than deploying a committed blind-pool fund. Compensation comes from a closing fee, an ongoing management fee from the acquired company, and carried interest on that transaction, all negotiated deal by deal with the capital providers. The model gives investors approval over each investment and gives the sponsor no guaranteed fee income, which makes certainty of closing the main execution question for a seller.

Individual-type Defined Contribution PensionStocks

The individual-type defined contribution pension is Japan's voluntary personal retirement account, commonly called iDeCo. A participant chooses a financial institution and contributes monthly up to a limit that depends on their employment category and any workplace plan, then allocates the balance across the deposit, insurance and investment trust options that institution offers. Contributions are deductible from taxable income, investment income inside the account is not taxed while it accumulates, and benefits taken at the qualifying age receive a separate allowance. Funds are generally locked until then, and limits are set by Japanese law.

Industry Loss WarrantyStocks

An industry loss warranty is a reinsurance or derivative contract that pays a fixed amount when total insured losses across the industry from a defined event exceed an agreed trigger, regardless of what the buyer itself lost. The trigger is measured by an independent loss estimation service. Because payout depends on an external index rather than the buyer's own claims, settlement is fast and documentation is simple, but the buyer carries basis risk: its own losses can be severe while the industry total falls short of the trigger.

Insurance-Linked SecurityStocks

An insurance-linked security is a financial instrument whose return depends on insurance loss events rather than on interest rates or corporate credit. Catastrophe bonds, collateralized reinsurance, industry loss warranties and sidecars all fall into the category: an insurer or reinsurer transfers a slice of its exposure to capital markets, investors post collateral, and they earn a spread for accepting the risk that a hurricane, earthquake or other defined event triggers a loss of principal. Because the driver is physical rather than economic, returns have historically shown little correlation with equity and bond markets.

Investment TrustStocks

An investment trust is a closed-ended company, listed on a stock exchange, whose business is holding a portfolio of investments on behalf of its shareholders. Because the share count is fixed rather than created and cancelled on demand, the shares trade at whatever price the market sets, which can be a discount or a premium to net asset value per share. The fixed capital base lets the manager hold illiquid assets and use gearing, and in the United Kingdom the structure may also retain income in reserve to smooth dividends.

Invoice DiscountingStocks

Invoice discounting is a financing arrangement in which a business borrows against the value of its unpaid sales invoices, receiving an advance of a percentage of the face amount and the balance, less fees, when the customer pays. Unlike factoring, the borrower usually keeps control of its own credit control and the arrangement can be confidential, so customers continue paying the business directly. Facilities are commonly with recourse, meaning the borrower absorbs the loss if a customer does not pay, and pricing combines an interest margin with a service fee.

Investment VehicleStocks

An investment vehicle is the legal and structural wrapper through which capital is pooled or held in order to make investments. Examples include mutual funds, exchange-traded funds, unit trusts, limited partnerships, investment companies, trusts and special purpose vehicles. The choice of vehicle determines who has control, how investors get in and out, what disclosure and regulatory obligations apply, how liability is limited, and how income and gains are taxed, all of which can matter as much to the outcome as the underlying assets held inside it.

IndentureStocks

An indenture is the contract between a bond issuer and its holders, administered by a trustee acting on the holders' behalf. It sets out the mechanical terms (principal, coupon, payment dates, maturity, any redemption or conversion rights) and the protective provisions: covenants restricting further borrowing, asset sales or distributions, the definition of default, the collateral if the bond is secured, and the majority required to amend terms. Because individual holders rarely negotiate, the indenture is where the protections an investor actually has are found.

Interest Rate DerivativeOptionsStocks

An interest rate derivative is a contract whose value depends on the level or shape of interest rates. The main forms are swaps, which exchange a fixed rate for a floating rate on a notional amount; futures and forward rate agreements, which fix a rate for a future period; and options such as caps, floors and swaptions. Banks, corporates and funds use them to change the interest rate profile of assets and liabilities without refinancing them, and they are the largest derivative category by notional amount outstanding.

Interest Rate Option(Interest Rate Options) OptionsStocks

An interest rate option gives the buyer the right, without the obligation, to receive a payment determined by where a reference rate settles relative to a strike. A cap pays when the rate rises above the strike on any reset date, protecting a floating rate borrower; a floor pays when it falls below, protecting a lender; a swaption gives the right to enter an interest rate swap at a set rate. The premium reflects the strike, time to expiry, the forward rate curve and expected rate volatility. Options on bond and rate futures also trade on exchanges, and borrowers use caps to limit funding cost while keeping the benefit of falling rates.

iNAV(indicative net asset value) Stocks

iNAV, or indicative net asset value, is an estimate of an exchange-traded fund's per-share portfolio value published at short intervals during the trading day, commonly every fifteen seconds. A third-party agent calculates it from the last disclosed basket of holdings priced at current market levels, plus cash, divided by shares outstanding. Traders compare the quoted share price against iNAV to judge whether the fund trades at a premium or a discount. It is an estimate rather than an executable price, and it is unreliable when underlying holdings sit in closed markets or trade infrequently.

industrial metalsFuturesStocks

Industrial metals are mined metals consumed chiefly by manufacturing and construction rather than held as monetary reserves, including copper, aluminum, zinc, nickel, lead, and tin. They trade as standardized exchange futures and as warrants against warehouse stocks, quoted per tonne or per pound. Demand tracks the industrial cycle, construction activity, and increasingly electrification and grid investment, while supply responds slowly because new mines take years to permit and build. Visible exchange inventories, smelter treatment charges, and the spread between spot and forward prices are watched as balance indicators.

infill landStocks

Infill land is a vacant or underused parcel located inside an already developed area rather than at the edge of a metropolitan region. Because surrounding streets, water, sewer, and power already exist, development avoids much of the horizontal infrastructure cost of a greenfield site, and the location usually supports higher rents. Offsetting that, parcels are small and irregular, may carry environmental legacy from prior industrial use, and face more restrictive zoning, neighborhood opposition, and parking requirements. Value therefore turns heavily on what entitlements can realistically be obtained.

intellectual propertyStocks

Intellectual property is the set of legally protected rights over creations of the mind, principally patents covering inventions, copyrights covering original expression, trademarks covering brand identifiers, and trade secrets covering confidential commercial information. Each right lets its owner exclude others from specified uses for a defined term and territory, and each can be sold, licensed, pledged as collateral, or contributed to a joint venture. As an asset class it produces income through licensing royalties, settlement of infringement claims, and the pricing power it confers on the products that embody it. Full guide →

investment thesisStocks

An investment thesis is a written statement of why a specific position should produce a return, naming the mechanism, the supporting evidence, the time horizon, and what would prove it wrong. A usable thesis identifies the variable the market appears to be mispricing, explains why that gap exists and why it should close, states the expected path of cash flows or valuation, and defines falsification conditions in advance. Writing it before buying separates the original reasoning from later rationalization and makes it possible to judge whether an outcome came from the thesis or from luck.

iSharesStocks

iShares is BlackRock's exchange traded fund brand and the largest such range by assets, spanning equity, fixed income, commodity and multi-asset products across dozens of listing venues. The range began as the World Equity Benchmark Shares country funds, was renamed by Barclays Global Investors in 2000, and passed to BlackRock when it bought that business in 2009. Individual iShares funds are separate legal entities with their own indices, fees and domiciles, so the brand identifies the sponsor rather than a single strategy.

Indemnity TriggerStocks

An indemnity trigger is a payout condition in a catastrophe bond or reinsurance contract that keys the payment to the sponsor's own verified losses from the covered event. It removes basis risk for the sponsor, because the recovery matches what was actually paid out on claims, but it delays settlement while claims are adjusted and requires investors to underwrite the sponsor's book and claims practices. Parametric and industry loss triggers pay faster on an objective measure instead, at the cost of a possible mismatch.

Indicated MarketStocksCrypto

An indicated market is an approximate bid and offer a dealer shows to signal roughly where a security might trade, without committing to deal at those levels. It appears where quotes are not firm and continuous: thinly traded bonds, pre-market and post-auction phases, and instruments quoted by appointment. A firm quote binds the dealer for a stated size; an indicated one is a starting point for negotiation, so the executable price can differ once the counterparty asks for a real one.

Inflation OptionStocks

An inflation option is a derivative whose payoff depends on a published price index such as the consumer price index. The common forms are caps and floors on realised inflation over a period, and options on the level of the index itself, settled in cash against the official print with its normal publication lag. Pension funds and insurers buy floors to protect liabilities linked to prices, while issuers of index-linked debt buy caps to limit how far their payments can rise.

Interest Coverage TestStocks

An interest coverage test is a covenant requiring a borrower to keep earnings at some minimum multiple of its interest expense, measured on defined terms and tested on a stated schedule. Failing it is an event of default that can accelerate the loan or block further borrowing, dividends or acquisitions. In structured finance the same mechanic diverts cash away from junior tranches and toward senior noteholders when coverage falls short. The precise definition of earnings and interest is negotiated, so two tests bearing the same name can behave differently.

Internal Capital GenerationStocks

Internal capital generation is the rate at which a company or bank builds equity from retained profit rather than from issuing shares. It is computed as return on equity multiplied by the share of earnings retained after dividends, and it sets the pace at which the balance sheet can expand without diluting existing owners or breaching capital requirements. A bank growing risk-weighted assets faster than this rate must eventually raise external capital, cut its payout, or slow lending.

Investment BankerStocksCrypto

An investment banker advises companies, governments and financial sponsors on raising capital and on mergers and acquisitions, and arranges the transactions that follow. The work covers valuation, structuring, drafting offering documents, marketing an issue to investors, and negotiating terms, with the bank often underwriting the deal by committing to buy the securities and resell them. Compensation comes mainly from fees tied to completion, which is why conflict-of-interest controls separate advisory teams from trading and research.

Irrational OptionStocks

An irrational option is an embedded option that holders do not exercise on purely economic grounds, so a valuation model assuming optimal exercise misprices it. The prepayment right in a residential mortgage is the standard example: some borrowers refinance long after it became profitable, and others repay when it is not, because moving, divorce, credit access and inertia drive the decision. Analysts therefore value such options with empirical behavioural models rather than with an optimal-exercise rule.

IS-LM ModelStocks

The IS-LM model is a macroeconomic framework that determines short-run output and the interest rate together. The IS curve traces combinations of output and interest rates at which planned investment and saving balance in the goods market, sloping downward because lower rates encourage spending. The LM curve traces combinations at which money demand equals a fixed money supply, sloping upward because higher output raises transaction demand for money. Their intersection identifies equilibrium: fiscal policy shifts the IS curve and monetary policy shifts the LM curve.

Immediate Or Cancel Order(IOC order) Stocks

An immediate-or-cancel order instructs a broker to execute whatever portion can be filled at once and cancel the rest instead of leaving it resting on the order book. It permits a partial fill, which distinguishes it from a fill-or-kill order that must execute in full or not at all. Traders use it to take available liquidity at a chosen limit price without leaving remaining size displayed to the market.

Impaired CreditStocks

Impaired credit describes a borrower whose repayment record or financial condition has deteriorated enough that lenders judge future repayment doubtful. It shows up as missed payments, defaults, collections, judgments or bankruptcy in a credit file, and lenders respond with higher rates, smaller limits, collateral demands or refusal. In bank accounting a loan is treated as impaired when it becomes probable that the contractual principal and interest will not be collected in full, which triggers a loss allowance.

InstrumentOptionsStocks

A financial instrument is a contract that creates a financial asset for one party and a financial liability or equity claim for another. Cash, bank deposits, shares, bonds, loans, futures, options and swaps are all instruments. They are commonly grouped into cash instruments, whose value is set directly in markets, and derivative instruments, whose value is derived from an underlying asset, rate or index. The contract terms define the payments, their timing and the rights attached.

InvestingStocks

Investing is committing money to an asset in the expectation that it will produce income, rise in value, or both, while accepting the possibility of loss. It differs from saving, which prioritises preservation and immediate access, and from speculation, which relies on short-term price movement rather than underlying cash flows. Returns arrive as interest, dividends, rent or a rise in market price, and they are compensation for bearing risk, illiquidity and the passage of time.

Investment PropertyStocks

An investment property is real estate held to earn rent, capital appreciation or both, rather than to occupy or to sell in the ordinary course of business. Lenders usually apply stricter underwriting than for an owner-occupied home, requiring larger down payments and charging higher rates because default rates on these loans are higher. Accounting and tax treatment also differ: expenses, depreciation and gains follow the rules for income-producing property set by the relevant tax authority.

InvestorStocks

An investor is a person or institution that commits capital to an asset expecting income or appreciation in return for accepting risk. Individual investors act for their own accounts, while institutional investors such as pension funds, insurers, endowments, mutual funds and sovereign funds invest pooled money for others and trade in far larger size. Securities rules often distinguish retail from accredited or professional investors, with eligibility thresholds set by the relevant regulator.

Implied Forward RateOptionsStocks

An implied forward rate is the future interest rate that today's spot rates imply, derived by requiring that investing for a long period gives the same result as investing for a short period and reinvesting at the forward rate. For example, one plus the two-year rate, squared, equals one plus the one-year rate multiplied by one plus the implied one-year rate a year forward. It is a break-even rate embedded in the curve, not a prediction of where rates will settle.

Index TrancheStocks

An index tranche is a standardised slice of the credit risk in a credit default swap index such as CDX or iTraxx, defined by attachment and detachment points expressed as percentages of the portfolio's loss. Losses on the underlying names hit the equity tranche first, then successively more senior slices. Because the contracts are standardised and quoted, they let traders take positions on the correlation of defaults, not only on the overall level of credit spreads.

INDEXATIONStocksCrypto

Indexation is the practice of linking a payment, threshold or contract value to a published index, so it moves automatically with that index rather than requiring a fresh decision. Wages, pensions, benefits, rents and tax brackets are commonly linked to a consumer price measure, and inflation-linked bonds adjust principal and coupons the same way. It protects real value against inflation, but it can also propagate a price shock by feeding it directly into the next round of costs.

Inflation AccountingStocksCrypto

Inflation accounting restates financial statements so that amounts recorded at different times are expressed in comparable purchasing power, rather than being added together as nominal historical costs. Methods include current purchasing power, which applies a general price index to historical figures, and current cost accounting, which revalues assets at replacement cost. Standards require this treatment for entities reporting in the currency of a hyperinflationary economy, since unadjusted statements would otherwise overstate profit and understate assets.

Inflation FutureOptionsStocks

An inflation future is an exchange-traded contract whose settlement value derives from a published price index, letting a user hedge or take a view on inflation without trading inflation-linked bonds. Contracts have referenced measures such as the US consumer price index or the euro area harmonised index, settling in cash against the index level or against its change over a period. Liquidity has generally been thinner than in the over-the-counter inflation swap market.

Inflation HawkStocksCrypto

An inflation hawk is a policymaker or commentator who gives priority to keeping inflation low, and is therefore inclined to favour higher interest rates and tighter policy even at the cost of slower growth or higher unemployment in the short run. The opposing stance is a dove, which weights employment and output more heavily. The labels describe a leaning rather than a fixed position, and individual central bankers move along the spectrum as data and circumstances change.

Initial YieldStocks

Initial yield is the income return on a property or investment in its first year, calculated as the current annual net rent or income divided by the purchase price including acquisition costs. In commercial property it is the standard entry measure and is compared with the reversionary yield, which reflects income once rents revert to market level at the next review or re-letting. Because it captures only the first year, it says nothing about future rental growth or void periods.

INSOLVENCYStocks

Insolvency is the state of being unable to pay debts as they fall due, which is the cash flow test, or of having liabilities that exceed assets, which is the balance sheet test. Either can trigger formal procedures, and directors of a company approaching it come under duties to consider creditors' interests. Outcomes range from restructuring the business as a going concern to liquidation, in which assets are sold and proceeds distributed in an order of priority set by law.

Intensity Model(reduced-form credit model) Stocks

An intensity model treats default as an unpredictable event arriving at a hazard rate, rather than as the result of a firm's asset value crossing a boundary. The intensity is the instantaneous probability of default per unit of time given survival so far, and the survival probability falls exponentially with the integral of that intensity. Because the intensity is calibrated directly to market credit spreads, these models fit observed prices well but say little about the corporate causes of default.

INTERESTStocks

Interest is the payment a borrower makes for the use of money, expressed as a rate applied to the outstanding principal over time. Simple interest is calculated on the original principal alone, while compound interest is calculated on principal plus accumulated interest, which is why compounding frequency changes the effective annual rate. Rates reflect the time value of money plus compensation for credit risk, expected inflation and the length of the commitment. Interest received is generally taxable income.

Investment PremiumStocks

Investment premium measures how much more a convertible bond costs than its worth as a plain bond. It is the market price minus the investment value, the estimated price the bond would fetch without its conversion feature, expressed as a percentage of that investment value. A high premium means the buyer is paying a lot for the equity option and has less downside cushion from the bond floor. It is examined alongside the conversion premium, which compares price with conversion value.

ijaraOptionsStocks

Ijara is an Islamic finance leasing contract in which a financier buys an asset and leases it to a client for agreed rental payments over a defined term. Because the return comes from rent on an asset the financier owns rather than from interest on a loan, the structure is used to achieve a financing outcome consistent with the prohibition on riba. Ownership risks such as major maintenance and casualty loss stay with the lessor for the contract to remain valid. A variant, ijara wa iqtina, adds a separate undertaking to transfer ownership to the lessee at the end of the term, giving an effect similar to a finance lease.

industrial revenue bond(industrial development bond) Stocks

An industrial revenue bond is a municipal security issued by a state or local authority on behalf of a private company to finance a qualifying facility such as a plant, port improvement or pollution control equipment. The issuing authority lends the proceeds to the company and is repaid from lease or loan payments, so the credit risk belongs to the private user rather than to the government, which does not pledge its taxing power. In the United States interest can qualify for exemption from federal income tax when the project falls within categories set by the Internal Revenue Code, and that exemption is what lowers the borrowing cost.

inflation swapOptionsStocks

An inflation swap exchanges a fixed rate for the realized change in a price index over the life of the contract. The most common form is a zero coupon swap with a single exchange at maturity: one side pays a compounded fixed rate and the other pays the cumulative percentage change in the reference index, such as a consumer price series, over the same period. Pension funds and insurers with index-linked obligations use it to hedge, while issuers of nominal debt take the other side. The fixed rate quoted is the breakeven inflation rate, which is why the swap curve is read as a market inflation expectation plus a risk premium.

insurable riskStocks

An insurable risk is an exposure that an insurer can practically underwrite, which requires several conditions to hold together. The loss must be accidental from the insured's point of view rather than intentional or certain; it must be definite in time, cause and amount so a claim can be measured; there must be a large number of similar independent exposures so expected losses can be estimated and pooled; the premium must be affordable relative to the potential loss; and the insured must have an insurable interest, meaning a genuine financial stake. Catastrophe exposures strain the independence condition, which is why they rely on reinsurance and capital markets.

interest rate marginStocks

An interest rate margin is the spread between the rate a lender charges and the rate it pays or a reference benchmark. For an individual loan it is the fixed increment added to a floating index, so a facility priced at a benchmark plus two hundred basis points carries a two hundred basis point margin that reflects credit quality, tenor and security. For a bank as a whole, net interest margin divides net interest income by average earning assets, showing how much the balance sheet earns after funding cost. Competition, the shape of the yield curve and the mix of deposits and wholesale funding all move it.

interest rate parityStocks

Interest rate parity is the no-arbitrage relationship linking two countries' interest rates to their spot and forward exchange rates. In covered form it states that the forward rate must equal the spot rate multiplied by the ratio of one plus the domestic rate to one plus the foreign rate, because otherwise a trader could borrow in one currency, convert, invest, and lock the return home at a riskless profit. In uncovered form the forward premium is replaced by the expected future spot change, which is a hypothesis about expectations rather than an arbitrage condition and is regularly violated in data, an anomaly that underpins the carry trade.

interest rate policyStocks

Interest rate policy is a central bank's use of a short-term policy rate to influence borrowing costs, demand and inflation. The bank sets a target or corridor and steers overnight funding toward it using open market operations and its standing facilities, and that rate then transmits through money market rates into loan pricing, asset valuations and the exchange rate. Decisions are taken against a mandate that typically names price stability and, in some jurisdictions, employment. Communication about the expected path matters as much as the current level, because medium-term rates reflect what markets expect the policy rate to be rather than what it is today.

interest-only mortgageStocks

An interest-only mortgage requires the borrower to pay only interest for an initial period, leaving the principal balance unchanged until that period ends. Payments are lower at first, but no equity is built through amortization, so the borrower depends on a separate repayment vehicle, a later sale, or a refinance to clear the balance. When the interest-only period expires the loan converts to full amortization over the remaining term, which produces a payment step-up that is larger the shorter the remaining period. If the rate is also floating, the reset and the amortization change can land together. Lenders assess affordability against the post-reset payment.

intermarket spreadStocks

An intermarket spread is a position that is long a futures contract in one market and short a related contract in a different but economically connected market, taking a view on the price relationship rather than on the direction of either leg. Examples include the crack spread between crude oil and refined products, the crush spread between soybeans and the meal and oil produced from them, and the spread between two government bond futures of different maturities or countries. Because the legs move together, exchanges commonly grant margin offsets, and the main exposure is that the historical relationship between the two markets changes.

investment managerCrypto

An investment manager makes and implements investment decisions on behalf of clients under a mandate that sets the objective, permitted assets, benchmark and risk limits. The role covers security selection or allocation, trade execution through brokers, ongoing monitoring and reporting, and it is normally paid a fee based on assets under management, sometimes with a performance element. Mandates run through pooled funds or separately managed accounts, and the manager may hold discretion to trade without prior client approval or act only on instruction. Registration and conduct obligations depend on jurisdiction and client type, and discretionary managers generally owe fiduciary or equivalent duties.

IO(interest-only strip) Stocks

An interest-only strip is the piece of a mortgage-backed security that receives only the interest portion of the underlying loan payments, with the principal portion going to a separate principal-only strip. Because interest accrues on an outstanding balance, faster prepayment shrinks the balance and cuts the cash flow the holder receives, so the strip loses value when rates fall and borrowers refinance. That gives it the unusual property of negative duration: its price tends to rise when interest rates rise. Investors use it to hedge portfolios of mortgage assets, and its valuation depends heavily on the prepayment model applied.

Irish asset covered securitiesStocks

Irish asset covered securities are covered bonds issued under Ireland's dedicated legislation by a designated credit institution, secured on a ring-fenced pool of mortgage or public sector assets that remains on the issuer's balance sheet. Holders have dual recourse: an ordinary claim against the issuing institution and, if it fails, a preferential claim on the cover pool ahead of unsecured creditors. The statute sets out eligibility criteria for cover assets, a minimum level of overcollateralization and the appointment of an independent monitor, and the issuer must replace assets that default or amortize to keep the pool compliant. That statutory framework is what distinguishes the structure from securitization.

irredeemable security(perpetual security) Stocks

An irredeemable security has no maturity date, so the issuer is never obliged to repay the principal and the holder's return comes entirely from the income stream and from selling to another investor. Undated government stock and perpetual preference shares are the classic examples. Valuation reduces to a perpetuity: the price is the annual payment divided by the required yield, which makes the price unusually sensitive to changes in that yield because there is no repayment date pulling it toward par. Many such instruments include an issuer call after a stated period, which converts an open-ended obligation into one the issuer can end at its choice.

issue priceStocks

The issue price is the amount investors pay for a security when it is first sold by the issuer, as distinct from the price it later trades at in the secondary market. Bonds are quoted as a percentage of face value, so an issue at par is priced at 100 while a discount issue is priced below and increases the effective yield above the coupon. Equity offerings set the price through bookbuilding, a fixed price, or an auction. The difference between the issue price and the first traded price is the initial return, and the gap between what investors pay and what the issuer receives is the underwriting spread.

income taxStocks

Income tax is a levy on the income earned by individuals and entities during a tax period. Most systems start from gross income, subtract allowable deductions and exemptions to reach a taxable base, then apply rates that often rise in bands as income increases, with credits applied afterwards. Investment income is frequently treated separately from wages, with different rules for dividends, interest and realized capital gains, and losses may be offset against gains within limits. Jurisdictions differ on whether they tax worldwide income or only income from local sources, and treaties allocate rights when both claim it. Rates, bands, deductions and thresholds are set by legislation and change.

IlliquidStocks

Describes an asset that cannot be sold quickly at a price close to its assessed value, because few buyers stand ready, quotes are wide, or the position is large relative to normal turnover. Real estate, private company stakes, thinly traded bonds and restricted shares are typical. The practical cost shows up as a discount to fair value on exit, a longer time to sell, or both, and it tends to widen exactly when markets are stressed.

Intercontinental ExchangeStocks

A United States exchange operator, listed as ICE, that runs energy and commodity derivatives markets, interest rate and equity index futures, and clearing houses in several jurisdictions. It acquired NYSE Euronext in 2013, bringing the New York Stock Exchange under its ownership, and has expanded into fixed income data, indices and mortgage technology. Its revenue mixes transaction and clearing fees with recurring data and listings income.

Intraday TradingStocks

Buying and selling within the same session so that no position is carried overnight. Traders work from short interval charts, order book depth and news, and close out before the bell to avoid gap risk from after-hours events. In the United States, accounts placing four or more such round trips within five business days are flagged as pattern day traders and face a higher minimum equity requirement under FINRA margin rules.

Income FundStocks

A pooled vehicle managed to produce a regular stream of distributions rather than capital appreciation, holding dividend-paying shares, bonds, preferred stock, real estate trusts or a mix. Payouts come from the interest and dividends the portfolio collects, less fees, and are usually made monthly or quarterly. The distribution rate is not fixed: it moves with the yields available on the underlying holdings, and reaching for a higher payout generally means accepting weaker credit or longer duration.

Index-Linked BondStocks

A bond whose principal or coupon is adjusted by a published price index so the holder receives a return in real terms. Payments are computed from an index ratio, the reference index at payment date divided by the index at issue, so the cash amount rises with inflation and the quoted yield is a real yield. United States Treasury inflation-protected securities and United Kingdom index-linked gilts follow this design, with details such as indexation lag and deflation floors differing by issuer.

Interbank MarketOptionsStocks

The wholesale market in which banks lend to and trade with one another, covering unsecured deposits, repurchase agreements, foreign exchange and derivatives. It lets institutions with surplus reserves place them with institutions that are short, and the rates struck there feed the benchmarks used to price loans elsewhere. Access depends on credit lines between the banks themselves, which is why the market can seize up quickly when counterparty concerns rise.

Investment AnalysisStocks

The evaluation of a security or project to judge whether its expected return compensates for its risk. Methods range from discounting projected cash flows and comparing valuation multiples against peers, through credit analysis of coverage and leverage, to quantitative factor screening and technical study of price behavior. Serious work states its assumptions explicitly and tests how the conclusion changes when they move, since the answer is usually more sensitive to growth and discount rate inputs than to the model chosen.

Investment FundStocks

A vehicle that pools money from multiple investors and invests it as one portfolio under a stated mandate, with each investor holding units or shares proportional to their contribution. Legal forms include open-end mutual funds that issue and redeem at net asset value, closed-end funds with a fixed share count that trade at a premium or discount, exchange-traded funds using in-kind creation, and limited partnerships for private strategies. Fees, redemption terms and disclosure obligations differ sharply between them.

Investment CompanyStocks

An entity whose main business is investing in securities on behalf of its shareholders, registered in the United States under the Investment Company Act of 1940. The Act recognizes open-end funds, closed-end funds and unit investment trusts, and imposes rules on custody of assets, leverage, transactions with affiliates, board independence and disclosure. Registration also shapes tax treatment: meeting the regulated investment company tests lets a fund distribute income to holders without paying entity-level tax on it.

incentive feeStocks

An incentive fee is a share of investment profits paid to a manager on top of the flat management fee, most commonly by hedge funds and private funds. It is typically calculated on gains above a high-water mark, so losses must be recovered before the manager is paid again, and sometimes above a hurdle rate the return must clear first. Because the fee shares in gains but not in losses, it can encourage additional risk-taking.

index arbitrageOptionsStocks

Index arbitrage exploits a gap between the price of a stock index futures contract and the cost of holding the underlying basket of shares. When the future trades above its fair value, calculated from the index level, financing cost and expected dividends until expiry, the arbitrageur sells the future and buys the basket, unwinding when the two converge. Execution runs through program trading systems because hundreds of legs must fill at once.

index modelStocksCrypto

An index model explains a security's return with a small number of common factors rather than with the full covariance matrix of every pair of assets. The single-index version regresses a stock's excess return on the market's excess return, producing an intercept (alpha), a slope (beta) and a residual assumed uncorrelated across stocks. Reducing thousands of covariance estimates to one factor per security makes portfolio optimization tractable and estimation error much smaller.

indexed bondsStocks

Indexed bonds link their principal, their coupon, or both to a published index, most often a consumer price measure, so payments rise and fall with that index. The holder receives a return stated in real terms plus whatever inflation the index records, which removes inflation risk from the cash flows while leaving real rate risk. Several governments issue them, and the gap between their yields and nominal yields is read as a market inflation expectation.

insured mortgageStocks

An insured mortgage carries a policy that pays the lender if the borrower defaults and sale of the property does not cover the debt. In the United States the cover can come from a government program or from a private mortgage insurer, and lenders generally require it when the loan is large relative to the property's value. The borrower pays the premium, and cover can usually be canceled once enough equity has built up.

Internal Revenue Service(IRS) Stocks

The United States federal agency that administers and enforces the Internal Revenue Code, operating as a bureau of the Department of the Treasury. It collects individual, corporate, payroll, estate and gift taxes, processes returns and refunds, issues the forms investors receive such as Form 1099 and Schedule K-1, publishes guidance interpreting tax law, and audits returns selected for examination. Contribution limits, bracket thresholds and standard deduction amounts are fixed in statute and adjusted on a published schedule, so the figures change from year to year and must be checked against current guidance.

International BondStocks

A debt security issued outside the borrower's home market, in a foreign currency, or to investors in more than one country. The category covers eurobonds (issued in a currency outside that currency's home jurisdiction), foreign bonds (sold in one national market by a foreign issuer under that market's rules), and global bonds placed simultaneously in several markets. Holders take the issuer's credit risk plus currency risk whenever coupon and principal arrive in a currency other than their own, and withholding tax, settlement convention and legal recourse follow the governing law named in the offering documents.

International FinanceStocksFutures

The study and practice of money flows across national borders: exchange rate determination, balance of payments accounting, cross-border investment, interest rate and purchasing power parity relationships, and the institutions that intermediate them. It treats a firm or country as operating in more than one currency, so hedging translation and transaction exposure, sovereign credit, capital controls and settlement across time zones sit at its center. Practitioners use it to price foreign assets, fund subsidiaries abroad, and manage the mismatch between where revenue is earned and where debt is owed.

International Finance Corporation(IFC) StocksCrypto

A member of the World Bank Group, established in 1956, that finances private sector projects in developing economies. Unlike the World Bank's lending to governments, it invests directly in companies through loans, equity stakes, guarantees and advisory work, and mobilizes additional money by syndicating portions of its loans to commercial banks and institutional investors. It funds itself largely by issuing bonds in international capital markets. Other lenders often treat its participation as evidence that a project has passed environmental, social and governance screening.

Investment ManagementStocks

The business of managing money on behalf of clients: setting an objective and constraints, building a portfolio of securities or funds to match it, executing trades, monitoring risk, and reporting results. Managers are typically paid a fee expressed as a percentage of assets under management, sometimes with a performance component. The work divides into discretionary mandates, where the manager trades without asking each time, and advisory mandates, where the client approves each decision. Registered managers must disclose their fees, conflicts and investment process to regulators and clients.

Irrational ExuberanceStocks

Investor enthusiasm that pushes asset prices well above what fundamentals such as earnings, cash flow or replacement cost would support. The phrase entered common use after Federal Reserve Chairman Alan Greenspan asked in a 1996 speech how anyone could know when asset values had become unduly escalated, and it was later the title of Robert Shiller's book on speculative bubbles. Analysts reach for it when valuation multiples, margin borrowing and new issue volume rise together while the underlying cash flows do not.

Islamic BankingStocks

Banking conducted under sharia principles, which prohibit riba (interest), excessive contractual uncertainty, and the financing of activities such as alcohol and gambling. Instead of charging interest, institutions use profit and loss sharing and asset-backed structures: murabaha (cost-plus sale), ijara (lease), mudaraba and musharaka (partnership forms), and sukuk, which give holders a share in an underlying asset's cash flows rather than a debt claim. A sharia supervisory board reviews products for compliance. Returns can resemble interest economically, but the contract must be tied to a real asset or to shared risk.

investment ratioStocksCrypto

The investment ratio expresses spending on new productive capacity as a share of a chosen base. In macroeconomics it is gross fixed capital formation divided by gross domestic product, showing how much of a country's output is committed to future capacity rather than to consumption. In company analysis the same construction compares capital expenditure with sales, total assets or the depreciation charge, indicating whether a firm is expanding its asset base or only replacing what wears out.

index numbersStocksCrypto

Index numbers restate a series of prices, quantities or values relative to a base period set equal to 100, so movements can be compared without reference to the original units. Each later observation is the current value divided by the base value, multiplied by 100. Weighting decides what the series actually measures: a Laspeyres index holds the base-period basket fixed, while a Paasche index uses the current basket. Consumer price and industrial production series are built this way.

ImmunizationStocks

Immunization structures a bond portfolio so a known future liability can be met despite moderate changes in interest rates, by setting the portfolio's duration equal to the liability's horizon and its present value equal to the liability's present value. The two effects a rate change produces then offset: a rise cuts prices but raises reinvestment income, and a fall does the reverse. It requires rebalancing as time passes and yields move, and it does not protect against non-parallel curve shifts or default.

Income ApproachStocks

The income approach values an asset from the income it produces, either by dividing a single stabilized annual income by a capitalization rate, or by discounting a projected stream of cash flows plus a terminal value at a required rate of return. In real estate the income used is net operating income, after operating expenses but before financing and taxes. It is one of three standard approaches, alongside the sales comparison approach and the cost approach, each a cross-check on the others.

Income PropertyStocks

Income property is real estate acquired to generate rent rather than for the owner's own use, including apartment buildings, offices, retail units, warehouses and single-family homes let to tenants. Its value derives from net operating income, rent less operating expenses, so leases, tenant credit quality, vacancy and expense recovery clauses drive it more than the physical building does. Financing terms, depreciation treatment and the tax rules on rental income and disposal differ from those applying to an owner-occupied home.

Income SmoothingStocksCrypto

Income smoothing is the use of accounting discretion to reduce period-to-period variation in reported earnings, by timing when reserves are built and released, when discretionary spending is recognized, or when transactions are completed. Some of it stays within accounting standards, since estimates legitimately involve judgment. It crosses into misreporting when entries are made without a factual basis, and the motive is usually that steadier earnings support a higher valuation and make management compensation targets easier to meet.

Installment DebtStocks

Installment debt is borrowing repaid through a fixed number of scheduled payments that cover interest and principal until the balance reaches zero. Auto loans, mortgages, student loans and personal loans take this form. It contrasts with revolving credit, where a balance can be drawn and repaid repeatedly with no set end date. Credit scoring models treat the two categories differently, because a declining installment balance is expected while a persistently high revolving balance signals strain.

Institutional Brokers' Estimate System(I/B/E/S) OptionsStocks

The Institutional Brokers Estimate System is a database that collects, standardizes and distributes earnings and other financial forecasts published by sell-side analysts, together with the consensus figures derived from them. Standardization matters because analysts define measures such as earnings per share differently, so raw numbers are not comparable until adjusted to a common basis. Consensus estimates from it are the reference against which reported results are judged to have beaten or missed expectations.

Insurable InterestStocksCrypto

Insurable interest is the requirement that the person buying insurance would suffer a genuine financial loss if the insured event occurred, which is what separates an insurance contract from a wager. Owners have it in their property, lenders in collateral securing a loan, and businesses in the lives of people whose loss would harm them. Property policies generally require it at the time of loss, life policies at the time the contract is made, and a policy lacking it is typically unenforceable.

IRS Publication 590Stocks

IRS Publication 590 is the Internal Revenue Service guidance covering individual retirement arrangements in the United States. It is now issued in two parts: 590-A deals with contributions, eligibility, deduction rules and rollovers, and 590-B deals with distributions, required minimum distributions, early withdrawal penalties and inherited accounts. The publications explain how the statute and regulations apply and are reissued each tax year, so contribution limits, income phase-out ranges and life expectancy tables are updated annually rather than fixed.

Identifiable AssetOptionsStocks

An identifiable asset is one that can be separated from the business and sold, licensed, rented or exchanged on its own, or that arises from contractual or other legal rights. The distinction matters in acquisition accounting: the buyer must recognize each identifiable asset and liability at fair value on the acquisition date, and only the residual purchase price left after that allocation becomes goodwill. Customer contracts, patents, trademarks and licences are typically identifiable, whereas an assembled workforce is not.

Identity theftStocks

Identity theft is the use of another person's identifying information, such as a national identification number, account credentials or date of birth, to obtain credit, funds, goods or services in their name. In a financial context it commonly appears as new accounts opened fraudulently, existing accounts taken over, or tax refunds claimed by an impostor. Defences include credit freezes, multi-factor authentication and transaction monitoring, and consumer protection statutes in many jurisdictions set out how disputed charges and fraudulent accounts must be investigated.

Impulse Wave PatternStocksCrypto

An impulse wave pattern is the five-wave sequence that moves in the direction of the larger trend in Elliott Wave analysis. Waves one, three and five advance with the trend while waves two and four correct against it. The framework imposes three rules: wave two never retraces all of wave one, wave three is never the shortest of the three advancing waves, and wave four does not overlap the price territory of wave one. A three-wave corrective sequence normally follows.

Income from OperationsStocks

Income from operations is the profit a business produces from its core trading activity, calculated as revenue less cost of sales and less operating expenses such as selling, general, administrative and depreciation charges. It deliberately excludes interest, investment gains, one-off items and income tax, so it isolates operating performance from how the company is financed and taxed. It appears as operating income on most income statements and is the starting point for margin analysis and for measures such as return on invested capital.

Incremental Capital Output Ratio(ICOR) StocksCrypto

The incremental capital output ratio estimates how much additional investment an economy needs to generate one extra unit of output, calculated as investment as a share of GDP divided by the GDP growth rate. A low ratio suggests capital is being deployed productively, while a rising ratio suggests each additional unit of investment is buying less growth. It is a crude aggregate measure that ignores the composition and quality of investment, lags between spending and output, and the contribution of labour and productivity.

Independent ContractorStocks

An independent contractor is a worker engaged to deliver a defined result while retaining control over how the work is performed, in contrast to an employee whose method and schedule the payer directs. The classification carries financial consequences: contractors generally invoice for their services, receive no payroll withholding, pay self-employment taxes on their own net earnings, and are usually outside employer benefit and retirement plans. Tax authorities and labour regulators apply multi-factor tests, and misclassification can trigger back taxes and penalties.

Insurance UnderwriterStocks

An insurance underwriter is the person or unit that decides whether an insurer will accept a proposed risk, on what terms and at what premium. The work involves assessing the applicant's exposure against the insurer's guidelines, setting deductibles, exclusions and coverage limits, and pricing the policy so expected claims, expenses and a profit margin are covered. Underwriters also decide how much of a large risk to retain and how much to pass to reinsurers, which is what protects the insurer's capital against concentrated losses.

Interbank Network for Electronic Transfer(INFINET) Stocks

The Interbank Network for Electronic Transfer is a shared automated teller machine and payment switch in India, developed by the Institute for Development and Research in Banking Technology on behalf of the Reserve Bank of India. It allowed customers of one member bank to use the terminals of another and settled the resulting claims between members. Its functions were later folded into the National Financial Switch operated by the National Payments Corporation of India as domestic retail payment infrastructure was consolidated.

International Swaps and Derivatives Association(ISDA) OptionsStocks

The International Swaps and Derivatives Association is the trade body for the over-the-counter derivatives market, best known for publishing the standard documentation that most bilateral trades are written under. Its master agreement, schedule, credit support annex and definitional booklets let two counterparties net exposures, post collateral and agree in advance what happens on default or early termination. It also runs the determinations committees that decide whether a credit event has occurred for credit default swaps, and it lobbies on market regulation.

Introducing Broker(IB) OptionsStocks

An introducing broker solicits and accepts customer orders but does not hold client money, securities or positions. It passes execution, clearing, settlement and custody to a separate clearing firm under a written agreement, and the clearing firm carries the accounts on its books. The arrangement lets a smaller firm offer market access without meeting the capital and operational requirements of self-clearing. In United States futures markets the role is a registration category supervised by the Commodity Futures Trading Commission and the National Futures Association.

Inventory AccountingStocks

Inventory accounting is the set of methods a business uses to value goods held for sale and to decide how much of that cost moves to cost of goods sold when items are sold. The main cost-flow assumptions are first-in first-out, last-in first-out and weighted average cost, and the choice changes reported profit and taxable income when prices are moving. Standards also require inventory to be written down when its net realizable value falls below cost. LIFO is permitted under United States rules but not under IFRS.

Investment Policy Statement(IPS) StocksCrypto

An investment policy statement is a written document that records the objectives, constraints and governance rules for managing a portfolio. It typically states the return objective and risk tolerance, the time horizon, liquidity and tax considerations, legal or regulatory limits, the permitted asset classes and target allocation with rebalancing bands, and how performance will be measured against a benchmark. Trustees, advisers and institutional committees use it to keep decisions consistent through market stress and to make accountability explicit.

Investment SecuritiesStocks

Investment securities are financial instruments bought and held for the income or appreciation they generate rather than for use in operations, and they appear as assets on the holder's balance sheet. The category covers equities, bonds, notes and similar tradable claims. Accounting rules require them to be classified by intent, commonly as trading, available for sale or held to maturity, and that classification determines whether they are carried at fair value or amortized cost and where unrealized gains and losses are reported. Banks hold large portfolios of them for liquidity and yield.

Investment StrategyOptionsStocks

An investment strategy is the stated set of rules that governs how a portfolio selects, sizes, holds and exits positions in pursuit of a defined objective. It specifies the universe of eligible assets, the criteria used to choose among them, the intended holding period, position and sector limits, and the conditions under which holdings are trimmed or replaced. Documented strategies range from broad passive index tracking to concentrated fundamental selection and rules-based systematic approaches, and the choice determines the risk exposures the portfolio carries.

Investment-grade securitiesStocks

Investment-grade securities are bonds and similar debt instruments carrying a credit rating in the upper bands of a rating agency's scale, meaning the agency judges the issuer to have a relatively low probability of default. On the major scales that means BBB minus or Baa3 and above. The distinction is not merely descriptive: many insurers, pension funds and bond index rules restrict holdings to this band, so a downgrade below it can force selling regardless of the manager's own view. Ratings are opinions, not guarantees.

Invisible HandStocksCrypto

The invisible hand is Adam Smith's metaphor for the way individuals pursuing their own gain in a competitive market can produce outcomes that benefit others without any of them intending it. Prices carry information about scarcity and demand, and profit and loss redirect resources toward uses buyers value more highly. The argument assumes competition, informed participants and prices that capture the full cost of an activity, which is why economists treat monopoly power, externalities and information gaps as cases where the mechanism does not hold.

impact dayStocksCrypto

Impact day is the day a new issue's final terms are announced to the market in United Kingdom offering practice: the price or price range, the size of the offer and the underwriting arrangements become public, and the prospectus is published. Before it, the issue is prepared confidentially while the sponsor gathers indications of demand. From it, the underwriters are committed and the price risk they carry begins, running until the subscription period closes. The term is heard less often now that bookbuilding has replaced fixed-price offers for most large flotations.

implied repo rateStocksFutures

The implied repo rate is the return earned by buying a deliverable bond, financing it to the futures delivery date and delivering it against a short futures position. It is calculated from the bond's purchase price, the invoice amount the short receives at delivery, which is the futures price times the conversion factor plus accrued interest, and any coupons received in between. Traders compare it across the deliverable basket: the bond with the highest implied repo rate is the cheapest to deliver, because it gives the best financed return, and it is the bond the futures contract effectively tracks.

implied yieldStocks

Implied yield is an interest rate backed out of the price of a traded instrument rather than observed directly. A three-month interest rate futures contract priced at 96.50 implies a rate of 3.50 percent, because the contract is quoted as 100 minus the rate. The same logic recovers a forward rate from two spot rates, a foreign currency interest rate from spot and forward exchange rates under covered interest parity, or a bond's yield to maturity from its price. The number is a market expectation only under specific assumptions, and it usually embeds a risk premium as well.

indemnity contractStocks

An indemnity contract obliges one party to make another whole for a defined loss, restoring the injured party to the financial position it held before the event rather than paying a fixed sum. Most property and liability insurance works this way, which is why claims are settled on the value of the actual loss, subject to limits and deductibles, and why recovery cannot exceed it. The principle supports two related rules: an insurable interest is required, and subrogation lets the payer pursue whoever caused the loss. Life insurance is not an indemnity contract, since it pays a stated benefit.

indicative quoteStocksCrypto

An indicative quote is a price a dealer shows as a guide to where it might trade, without any obligation to deal there. It signals a rough level so a client can decide whether to ask for a firm price, and it is common in less liquid markets such as corporate bonds, structured products and over-the-counter derivatives, where a dealer will not commit before knowing size and direction. The contrast is a firm quote, which binds the dealer for at least the displayed size. Valuations built from indicative quotes are estimates, and the gap to an executable price can be wide when markets are stressed.

inflation targetStocks

An inflation target is a publicly stated rate of consumer price inflation that a central bank commits to achieving over the medium term, using its policy instruments and accepting accountability for missing it. Targets are expressed as a point or a range for a specific price index, over a horizon long enough to look past temporary shocks. The commitment is meant to anchor expectations, so wage and price setters plan around the target rather than around recent outturns, which makes inflation cheaper to control. Frameworks differ in whether the target is set by government or by the bank, and in how misses must be explained.

insider systemStocks

An insider system is a pattern of corporate ownership and control in which a small number of committed shareholders, typically banks, families, other companies or the state, hold large stakes and monitor management directly, with limited reliance on the stock market for discipline. Germany and Japan have historically been described this way. The contrast is an outsider system, as in the United States and United Kingdom, where ownership is dispersed among many institutional investors and control changes mainly through takeovers and share price pressure. The distinction shapes how firms raise capital, how minority holders are protected and how quickly weak management is replaced.

installment creditStocks

Installment credit is consumer or business borrowing repaid in a fixed schedule of periodic payments covering both interest and principal until the balance reaches zero. Car loans, equipment finance and personal loans work this way. Each payment starts mostly as interest and shifts toward principal as the balance falls, which is what an amortisation schedule sets out. It differs from revolving credit, where the borrower draws and repays within a limit and the balance has no set end date. Because the repayment path is fixed at the outset, lenders can project exposure and cash flows more precisely.

insuredStocks

The insured is the person or entity whose interest is protected by an insurance policy, so that a covered loss triggers payment. The named insured appears on the policy and holds the rights and duties in the contract, including paying premiums and giving notice of claims, while additional insureds gain protection under the same policy for a defined interest. The insured need not be the party who receives the money: a life policy pays a named beneficiary, and a liability policy pays the injured third party. Cover generally requires an insurable interest, which prevents insurance being used as a wager.

inter-dealer brokerStocksCrypto

An inter-dealer broker arranges trades between dealers rather than with end investors, in markets where dealers want to adjust positions without revealing their identity or intentions to competitors. The broker matches interest over voice lines and electronic screens and is paid a commission; under name-passing arrangements the counterparties settle directly with each other once matched. The service concentrates liquidity in government bonds, swaps, repo and foreign exchange. Because the resulting prices are among the few observable data points in over-the-counter markets, broker screens have long been an important reference for valuation and for benchmark construction.

internal auditStocks

Internal audit is an independent function inside an organisation that examines whether controls, risk management and governance processes are working, and reports its findings to the audit committee of the board rather than to the managers whose activities it reviews. That reporting line is what preserves its independence. Its work is continuous and covers operational and compliance matters as well as financial reporting, so it is broader than the external audit, which is performed by a separate firm and gives an opinion on whether financial statements are fairly stated. The two coordinate, but neither substitutes for the other.

inventory financingStocks

Inventory financing is borrowing secured by goods a business holds for sale, letting it pay suppliers and fund stock before that stock converts into cash. Lenders advance a percentage of appraised value, discounting for how quickly the goods could be resold, and monitor the collateral through periodic counts, field examinations or a warehouse arrangement in which a third party controls release. Advance rates are lower for perishable, seasonal or specialised inventory than for standard commodities. It usually sits alongside receivables financing in a working capital facility, since the two cover consecutive stages of the same operating cycle.

invisiblesStocks

Invisibles are the items in a country's balance of payments current account that are not physical merchandise: services such as transport, tourism, insurance and professional fees, plus investment income and current transfers. They are recorded because they generate cross-border payments exactly as goods do, but nothing crosses the border in a form a customs officer can count, which is where the name comes from. A country can run a deficit on visible trade and still balance its current account through a surplus on invisibles, a pattern long characteristic of the United Kingdom.

involuntary bankruptcyStocks

An involuntary bankruptcy is a case that creditors, not the debtor, start by filing a petition asking a court to place the debtor into a bankruptcy proceeding. United States law sets conditions: a minimum number of qualifying petitioning creditors depending on how many creditors the debtor has, a minimum amount of undisputed unsecured claims that is adjusted periodically, and a showing that the debtor is generally not paying debts as they fall due. The debtor may contest the petition, and a court that dismisses one filed in bad faith can award costs, fees and damages against the petitioners.

irrevocable letter of creditStocks

An irrevocable letter of credit is a bank's undertaking to pay a beneficiary against presentation of specified documents, which cannot be amended or cancelled without the agreement of everyone involved. That fixity is what makes it useful in international trade: an exporter shipping to an unfamiliar buyer relies on the issuing bank's credit rather than the buyer's. Payment turns on documents alone, so the bank pays if the presentation complies on its face even when the goods disappoint, and refuses if documents are discrepant even when the goods are fine. A confirmed credit adds a second bank's independent undertaking.

ISA mortgageStocks

An ISA mortgage is a United Kingdom arrangement in which the borrower pays only interest on the loan and separately contributes to an Individual Savings Account, intending to repay the capital as a lump sum from the accumulated investments at the end of the term. The lender's balance therefore does not fall over the life of the mortgage. Whether the plan clears the debt depends on investment returns inside the wrapper, so a shortfall leaves the borrower still owing the original capital. A repayment mortgage, which amortises principal with every payment, carries no such gap.

implied correlationStocks

Implied correlation is the correlation figure that makes a model reproduce the market price of an instrument whose value depends on how several assets move together, such as an index option compared with options on its constituents, a basket or spread option, or a credit portfolio tranche. It is extracted from prices rather than estimated from history, so it reflects what participants will pay for co-movement, including a risk premium. Index implied correlation typically sits above realised correlation, because investors pay for protection against everything falling at once, and it rises sharply in stressed markets when dispersion collapses.

implied dividend yieldStocksOptions

Implied dividend yield is the dividend rate backed out of traded prices rather than taken from announced payments. Put-call parity links a European call and put at the same strike and expiry to the forward price, so once the option prices, the strike, the spot price and the interest rate are known, the remaining unknown is the dividend the market expects before expiry. Dividend futures and swaps give the same information directly. The figure is forward-looking and can differ from trailing yield, particularly where a cut or a special payment is anticipated, and it embeds a risk premium.

implied volatility function (IVF) modelOptionsStocks

The implied volatility function model, also called the implied tree or local volatility approach, makes volatility a deterministic function of the asset price and time, chosen so the model exactly reproduces the observed prices of traded European options across all strikes and maturities. That fit lets it value exotic and path-dependent payoffs consistently with the visible smile. Its limitation is dynamic: because volatility depends only on price and time, the model implies how the smile will evolve as the asset moves, and that implied evolution often disagrees with what markets actually do, which matters most for hedging.

indexed principal swapOptionsStocks

An indexed principal swap is an interest rate swap whose notional amount amortises according to the level of a reference rate rather than on a fixed schedule. The notional typically falls faster when rates decline, mimicking the way mortgage borrowers prepay when refinancing becomes attractive. That structure lets a holder of mortgage-backed securities hedge an exposure whose size shrinks in exactly the circumstances that hurt it. The counterparty on the other side is effectively short a series of options on the reference rate, so the fixed rate on the swap is set above a plain vanilla level as compensation.

Input ListStocksCrypto

The set of estimates a mean-variance optimizer needs before it can build an efficient frontier: an expected return and a variance for every security plus a covariance for every pair. For a universe of n securities that means n expected returns, n variances and n times n minus one divided by two covariances, so the count grows roughly with the square of the universe. Index models cut the list by expressing co-movement through a few common factors.

IRS Publication 550Stocks

The Internal Revenue Service guide covering investment income and expenses for individuals, explaining how interest, dividends, and capital gains and losses are reported and taxed. It addresses areas where the mechanics are easy to get wrong: original issue discount, tax-exempt and taxable municipal interest, the wash sale rule, holding periods, straddles, worthless securities, and the treatment of investment interest expense. It is guidance rather than law, so the Internal Revenue Code and regulations govern in any conflict, and each year's edition reflects that year's rules.

Indirect MethodStocks

The presentation of the cash flow statement's operating section that begins with net income and adjusts back to cash: adding non-cash charges such as depreciation, amortization, and share-based pay, removing gains and losses belonging to investing or financing activities, and adding or subtracting changes in working capital. The direct method instead lists actual cash receipts and payments. Both reach the same operating cash figure, and most companies choose the indirect version because it reconciles visibly to the income statement they already publish.

Indirect QuoteStocksFutures

A currency quotation expressing how many units of a foreign currency one unit of the domestic currency buys, the reverse of a direct quote. From a United States perspective, quoting Japanese yen per dollar is an indirect quote, while quoting dollars per euro is direct. The distinction matters when reading a rise or fall: under an indirect quote a higher number means the domestic currency has strengthened, which is the opposite of what a higher direct quote implies. Each quote is the reciprocal of the other.

Industrial OrganizationStocks

The branch of economics studying how firms behave when markets are not perfectly competitive, and what that implies for prices, output, innovation, and welfare. It examines market structure, entry barriers, pricing conduct such as bundling and price discrimination, product differentiation, and strategic interaction analysed with game theory. It is the analytical foundation of competition policy, supplying the tools used to define a relevant market, measure concentration, and predict whether a merger or a practice will raise prices or foreclose rivals.

Inefficient MarketStocksCrypto

A market in which prices do not fully reflect available information, so identifiable mispricings persist long enough to be acted on. Causes include thin trading, high transaction and borrowing costs, restrictions on short selling, limited analyst coverage, and slow or unequal information flow. Small-capitalization shares, private assets, and frontier markets are the usual examples. Inefficiency is not free money: the same frictions that let a mispricing survive also raise the cost and risk of trading it, and identifying one in advance is the hard part.

Inflationary GapStocksCrypto

The amount by which actual output exceeds the economy's estimated potential output, meaning demand is running beyond what the available labour and capital can sustainably supply. Symptoms are unemployment below its non-accelerating rate, capacity utilisation running high, and rising wage and price pressure as employers bid for scarce inputs. It is the mirror image of a recessionary gap. Because potential output is estimated rather than observed, the size of the gap is revised substantially after the fact, which complicates policy set in real time.

Intentionally Defective Grantor TrustStocks

An irrevocable trust deliberately drafted so that assets are outside the settlor's estate for transfer tax purposes while the settlor remains the owner for income tax purposes. The defect is intentional: a retained power that triggers the grantor trust rules without causing estate inclusion. The settlor pays the income tax on the trust's earnings, which lets the trust compound untaxed and reduces the settlor's own estate further without that payment counting as an additional gift. Sales of appreciating assets to the trust are ignored for income tax while it lasts.

Interbank RateStocksCrypto

The interest rate at which banks lend to one another in the wholesale market, usually for short maturities and often unsecured. It reflects the policy rate plus a premium for bank credit and funding conditions, so it widens sharply when counterparty concerns rise. Published benchmarks derived from it are used to price loans, mortgages, and derivatives, and reform since the manipulation scandals has moved many of them toward rates computed from actual overnight transactions. In foreign exchange the same term describes the wholesale rate dealers quote each other, which is finer than any retail rate.

Interest Rate Call OptionOptionsStocks

An option that pays its buyer when a reference interest rate rises above an agreed strike rate on the fixing date, with the payoff calculated on a notional principal for a defined period. Borrowers on floating rate debt buy them to cap their cost while keeping the benefit if rates fall, paying a premium for that asymmetry. A series of such options covering consecutive periods on the same notional is an interest rate cap, and each individual option within it is called a caplet.

Interest Rate SensitivityStocks

The degree to which a security's price changes when market interest rates move. For a bond it is summarised by duration, which approximates the percentage price change for a one percentage point shift in yield, and refined by convexity, which captures the curvature that duration alone misses. Longer maturity, lower coupon, and lower yield all increase it. The same idea extends to portfolios, to banks measuring the repricing gap between assets and liabilities, and to equities whose valuations lean heavily on distant cash flows. Full guide →

Interim DividendStocks

A dividend declared and paid partway through a company's financial year, before the annual results are finalised and before shareholders approve a final dividend. Directors normally have authority to declare it from distributable profits without a shareholder vote, which is why it can be cancelled more readily than a final dividend. Companies use it to spread payments evenly through the year rather than making one large annual distribution, and a cut to an interim payment is often the earliest formal sign that earnings are under pressure.

Internal AuditorStocks

An employee or contracted specialist who independently examines an organisation's controls, risk management, and governance and reports findings to the audit committee rather than to the managers whose work is being tested. The role is assurance and improvement inside the organisation, distinct from the external auditor, who reports to shareholders on whether the financial statements are fairly stated. Independence is structural: reporting lines to the board, and a mandate covering operations, compliance, and fraud risk as well as financial reporting.

Internal ControlsStocks

The policies, procedures, and system checks an organisation uses to safeguard assets, keep accounting records reliable, ensure compliance with laws, and make operations effective. Typical mechanisms are segregation of duties, authorisation limits, reconciliations, physical safeguards, and access restrictions in software. In the United States, listed companies must assess and report on the effectiveness of internal control over financial reporting under the Sarbanes-Oxley Act, and a material weakness in them must be disclosed because it means an error could go undetected.

International InvestingStocksCrypto

Allocating capital to assets outside an investor's home country, through foreign-listed shares, depositary receipts, international funds, or bonds issued abroad. The case for it is that home markets represent only part of global output and their sector mix and cycle differ from others. The added exposures are real and specific: currency movements that can dominate returns over short periods, differing accounting and disclosure standards, withholding tax on income, custody arrangements, and political or capital-control risk that has no domestic equivalent. Full guide →

International Labor OrganizationStocks

A United Nations agency, founded in 1919, that sets international labour standards through conventions and recommendations adopted by its member states. Its structure is tripartite, giving governments, employers, and workers each a formal voice in adopting standards and supervising their application, which is unusual among international bodies. It has no direct enforcement power: conventions bind a country only once ratified, and compliance is pursued through reporting, supervision, and publicity. It also publishes widely used global statistics on employment, wages, and working conditions.

InterpolationStocks

Estimating a value that falls between two known data points by assuming a rule about how the quantity behaves in between. Linear interpolation draws a straight line between the neighbouring points, while spline and cubic methods fit smoother curves. In finance it is used constantly: deriving a yield for a maturity no bond exactly matches, filling a missing point on a volatility surface, or pricing a swap against a curve built from a handful of liquid instruments. Estimating beyond the known range is extrapolation and is far less reliable.

InterventionFuturesStocks

Action by a government or central bank to influence a market price directly, most commonly buying or selling its own currency in the foreign exchange market to counter a move judged excessive or disorderly. It can be unilateral or coordinated across countries, and sterilised, where the effect on domestic money supply is offset by an opposite operation, or unsterilised, where it is not. Effects tend to be short-lived unless the intervention is backed by a change in policy, since reserves are finite and markets test the commitment.

Investment ProductStocks

A packaged instrument sold to investors that gives exposure to underlying assets or strategies, such as a mutual fund, exchange-traded fund, annuity, structured note, or unit trust. What defines it is the wrapper: legal form, fee schedule, liquidity terms, tax treatment, and disclosure obligations sit at the product level and can differ substantially between two products holding nearly identical assets. Comparing products therefore means comparing costs, redemption terms, and who bears which risk, not only the exposure described on the cover.

Invoice FinancingStocks

An umbrella term for borrowing against unpaid customer invoices to convert receivables into cash before customers pay. It takes two main forms: factoring, where invoices are sold to a finance provider that usually also collects them, and discounting, where the business borrows against the invoices and keeps its own collections, often confidentially. Advances cover a percentage of face value, with the balance released after payment less fees. Cost is driven by the advance rate, the fee structure, and whether the facility carries recourse for unpaid invoices.

Idle BalanceStocks

Money held in an account that is neither invested nor lent and therefore earns little or no return. In a brokerage or fund context it is cash awaiting deployment, and whether it is swept into an interest-bearing vehicle determines what the holder actually receives on it. In monetary economics the phrase describes balances held for precautionary or speculative reasons rather than to finance transactions, so a rise in such holdings shows up as a fall in the velocity of money.

ILS(Insurance-Linked Securities) Stocks

Insurance-linked securities, instruments whose payments depend on insurance loss outcomes rather than on the credit or earnings of a company. A catastrophe bond is the common form: the investor's principal sits in a collateral trust and is forfeited in whole or part if a defined trigger is breached during the risk period, whether that trigger is an index of industry losses, a modelled loss or the sponsor's actual claims. The attraction for investors is that natural catastrophe risk is largely uncorrelated with financial markets.

Incorporeal InterestStocks

A property right that confers no right of physical possession, such as an easement, a right of way, a profit taken from another's land, a rentcharge or a royalty. It is real property in law and can be bought, sold, mortgaged and inherited, but its value comes from the entitlement it carries rather than from occupying anything. Valuation therefore rests on the income or cost saving the right produces, how long it lasts, and how enforceable it is against successors in title.

Incurred LossStocksCrypto

The cost of claims attributable to a period, calculated as claims paid during the period plus the closing reserve for reported and unreported claims minus the opening reserve. It measures what the period's exposure actually cost rather than what was paid out during it, since a claim can be reported in one year and settled several years later. Dividing it by earned premium gives the loss ratio, and later revisions to the reserve estimate appear as development in subsequent periods.

Indemnity CompanyStocks

An insurer that writes contracts of indemnity, under which it pays the insured the measured amount of a loss so as to restore the pre-loss financial position and no more. That principle caps recovery at the actual loss and supports subrogation, so once the insurer pays it takes over the insured's right to recover from whoever caused the damage. It distinguishes such cover from valued policies, which pay an agreed sum, and from life contracts, which pay a stated benefit rather than a measured loss.

Ineligible BillStocksCrypto

A bill of exchange the central bank will not accept for rediscount or as collateral, because it fails the published criteria on acceptor quality, underlying transaction or maturity that define eligible paper. Ineligibility does not make the bill invalid; it removes the central bank as a source of liquidity against it, so such paper trades at a wider yield than eligible paper of similar credit standing. The criteria themselves are set by the central bank and change as policy changes.

Inflation SpiralStocksCrypto

A self-reinforcing process in which price rises and cost rises feed each other. Workers seeking to restore real pay negotiate higher wages, firms pass the higher labour cost into prices, and the resulting price level prompts the next round of wage claims. Expectations are the transmission channel: once participants build continued inflation into contracts, the process persists without further external shocks, which is why central banks treat measures of expected inflation as an object of policy in their own right.

Inside InformationStocks

Specific, non-public information about an issuer or its securities that a reasonable investor would consider significant in deciding whether to trade. Dealing while in possession of it, passing it to someone who then trades, or recommending a trade on the basis of it is prohibited under securities law in most jurisdictions, whether the holder is an insider or received it from one. Firms manage the exposure with restricted lists, information barriers between departments, and logs recording who was made an insider and when.

Insolvency RiskStocks

The chance that an entity's liabilities exceed the realisable value of its assets, or that it cannot meet obligations as they fall due, so creditors are not paid in full. The balance-sheet form is measured by comparing asset values against debt; the cash-flow form depends on the timing of maturities against available liquidity, and an entity solvent on the first test can still fail the second. For an investor it determines expected recovery, which follows ranking in the capital structure and any security held.

Installment OptionOptionsStocks

An option whose premium is paid in a series of instalments over its life rather than in full at inception. The holder may stop paying at any instalment date, at which point the contract lapses and nothing further is owed, so the arrangement embeds a sequence of decisions about whether to continue. Total premium paid if held to expiry exceeds the equivalent upfront price, which compensates the seller for the abandonment right, and valuation treats the structure as a compound option.

Institutional BrokerStocksCrypto

A broker whose clients are pension funds, insurers, asset managers and other professional investors rather than individuals. The service is built around executing large orders with limited price impact, so it involves working orders over time, sourcing block liquidity, algorithmic execution and transaction cost analysis, and it is often paid for through commissions that may also cover research subject to local unbundling rules. Regulatory obligations differ from retail broking because the clients are classified as professional counterparties.

Intermarket Sweep OrderStocksCrypto

A limit order marked so that a United States trading centre may execute it immediately at its own price without waiting for a better-priced quotation displayed elsewhere. The marking is a representation by the sender that it has simultaneously routed orders to take out the better-priced protected quotations at other venues. It exists because the order protection rule of Regulation NMS otherwise forbids trading through a better displayed price, and it lets a large order sweep several price levels across multiple venues in one action.

InterpositioningStocksCrypto

Inserting an additional broker-dealer between a customer's order and the market when doing so serves no purpose for the customer, with the extra intermediary taking a markup or receiving payment for the order flow. The result is a worse net price than the customer would have obtained by going directly, which conflicts with the duty of best execution. United States regulators have brought enforcement cases over it, and the test applied is whether the added party performed a service justifying its compensation.

Investment LetterStocksCrypto

A signed statement from a buyer of unregistered securities that the purchase is for investment and not with a view to immediate resale. It supports the issuer's reliance on a private placement exemption from registration, since that exemption fails if the buyer is really acting as an underwriter. Securities acquired this way are restricted and usually carry a legend, and they can be resold only under a registration statement or a resale safe harbour with its own holding period and information conditions.

Issue DateStocks

The date on which a security is formally created and delivered to its first holders, and the date from which interest or dividend entitlement begins to accrue. For a bond it anchors the coupon schedule and the calculation of accrued interest on later trades, and it can differ from both the pricing date and the settlement date of the initial sale. For savings bonds and similar registered instruments it also starts any minimum holding period or early redemption penalty.

Implied TreeOptionsStocks

A binomial or trinomial lattice whose transition probabilities and node values are fitted so that the model reproduces the market prices of traded options across strikes and maturities. Rather than assuming one constant volatility, it backs a local volatility surface out of the observed smile and then uses that surface consistently to price and hedge exotic and path-dependent contracts. Its weakness is stability: the fit depends on interpolating a limited set of quoted options, so small input changes can move the implied surface noticeably.

Index Amortizing SwapOptionsStocks

An interest rate swap whose notional amount declines according to a schedule tied to the level of a reference rate or index rather than by fixed steps. Amortisation typically accelerates when rates fall, mimicking the way mortgage principal prepays faster in a falling rate environment. The party receiving fixed effectively sells that optionality and is compensated with a higher rate. It was used to hedge or to replicate the negative convexity of mortgage portfolios without holding the underlying loans.

Indirect taxationStocks

Tax levied on transactions rather than on a person's income or wealth, collected from a supplier who is expected to pass the cost into the price the buyer pays. Value added tax, sales tax, excise duties, stamp duty and customs tariffs are the common forms. Because liability follows spending rather than earnings, the burden depends on what a household consumes, and how much of it actually falls on buyers rather than sellers is determined by the relative price elasticity of demand and supply.

Illiquidity CostStocksCrypto

The value given up in converting a position into cash quickly, made up of the quoted spread, the price impact of the order's own size, and any concession needed to find the other side. It rises with order size relative to normal volume and with urgency, which is why the same trade can cost several times more executed in an hour than spread across days. Implementation shortfall is the standard measure, comparing the realised price against the price when the decision was made, so it captures delay as well as explicit cost.

Illiquidity PremiumStocksCrypto

The additional expected return investors require to hold an asset that cannot be sold quickly at a reliable price. It compensates for the cost and uncertainty of exit rather than for cash flow risk, which is why two claims on identical cash flows can price differently when one trades daily and the other rarely. Private equity, direct property, private credit and off-the-run bonds are usually discussed in these terms. Measurement is contested, because reported returns on infrequently traded assets are smoothed by stale valuations, which understates volatility and flatters the apparent premium.

Intermarket Spread SwapStocks

A bond portfolio trade that sells one sector and buys another because the yield spread between them is judged to be away from its normal relationship. A manager who thinks the corporate to Treasury spread is unusually wide sells Treasuries and buys corporates, expecting the spread to narrow, then reverses the position when it does. The risk is that the spread is wide for a reason: the market may be pricing a deterioration in credit or liquidity the historical relationship does not capture, so the position can widen further before it converges.

International Financial Reporting Standards(IFRS) Stocks

The accounting standards issued by the International Accounting Standards Board and required or permitted for listed company reporting in more than a hundred jurisdictions, including the European Union and the United Kingdom. They are more principles-based than United States generally accepted accounting principles, and the differences that matter to analysts include the treatment of development costs, the prohibition on last in first out inventory accounting, and the revaluation option for property, plant and equipment. Comparing companies reporting under each framework requires adjusting for these before ratios are read across.

Import DutyStocks

A tax a government levies on goods entering its customs territory, charged as a percentage of declared value, as a fixed amount per unit, or as a combination. Rates depend on the tariff classification of the goods, their declared origin and any preferential trade agreement that applies. The duty raises the landed cost, which shifts demand toward domestic substitutes, and it is collected at the border before goods are released.

Imprest AccountStocks

A fund held at a fixed authorised balance for a defined purpose, such as petty cash or a branch float, that is topped up periodically by exactly the amount spent since the last reimbursement. Because the cash on hand plus the supporting vouchers must always equal the fixed sum, the arrangement builds a reconciliation into itself and limits how much can be lost or misapplied before the shortfall is visible.

Incorporated(Inc.) Stocks

A designation showing that a business has been registered as a corporation, giving it legal personality separate from its owners. That separation is what limits shareholder liability to the capital subscribed, lets the entity own property, contract and sue in its own name, and gives it continuity independent of any individual owner. In exchange the entity accepts filing, accounting and governance obligations, and its profits are taxed at the entity level in most jurisdictions.

Incurred Loss RatioStocks

The share of premium an insurer consumes in claims, measured by dividing losses incurred during the period, meaning claims paid plus the change in reserves for reported and unreported claims, by premium earned in that period. Using incurred rather than paid losses matches the cost of the period's exposure to the premium that covered it. Adding the expense ratio to it gives the combined ratio, which shows whether underwriting was profitable before investment income.

Index-Linked AnnuityStocks

An annuity whose income payments rise in line with a published price index, so the purchasing power of the income is protected against inflation up to any cap in the contract. Because the insurer must fund escalating payments, the starting income is materially lower than a level annuity bought with the same sum, and the buyer only comes out ahead if they live long enough for the increases to compensate. It is a different product from an indexed annuity, which credits interest linked to a market index.

Insolvency ClauseStocks

A reinsurance provision stating that the reinsurer remains liable for its full share of a claim even if the ceding insurer becomes insolvent, with payment made to the liquidator or estate rather than reduced to whatever the cedant actually pays out. Without it the reinsurer could argue it owes only the diminished sum an insolvent cedant disburses. Insurance regulators generally require the clause before reinsurance recoveries may be credited in statutory accounts.

Insurance AgentStocks

An intermediary who sells and services policies on behalf of one or more insurers, holding an agency appointment that authorises them to act for the insurer and usually paid by commission on premium. Because the agent represents the carrier, knowledge given to the agent is generally treated as given to the insurer, and the agent's authorised acts bind it. This is the opposite of a broker, who is appointed by and acts for the buyer.

ISMA(International Securities Market Association) Stocks

The self-regulatory trade body for the international bond market that set trading, settlement and market practice rules for eurobond dealers, published standardised yield calculation conventions and ran the quotation and reporting systems its members used. It merged in 2005 with the International Primary Market Association to form the International Capital Market Association, which continues its rulebook and standard documentation work for cross-border debt markets.

iTraxx EuropeStocksCrypto

A family of credit default swap indices referencing baskets of European corporate names, most prominently a main index of investment grade issuers and a crossover index of sub-investment grade names, with the constituents reset every six months into a new series. Trading the index transfers the credit risk of the whole basket in one contract, and the level is quoted as a running spread. It is used to hedge portfolios and to express a view on European credit conditions.

Inception Profit(day one profit) OptionsStocks

The gain a dealer books immediately when a derivative is transacted at a price better than the value its own model assigns, most commonly on structured trades where the client cannot easily price the product. Accounting standards restrict recognising it when the valuation relies on unobservable inputs, requiring the amount to be deferred and released over the life of the trade or as inputs become observable, because an unverifiable model difference is not a realised gain.

InequalityStocksCrypto

The dispersion of income, wealth or consumption across a population, measured with summary statistics such as the Gini coefficient, income share ratios between the top and bottom of the distribution, or the share held by the top percentile. Wealth is normally distributed far more unevenly than income because it accumulates and is inherited. Economists study it because it interacts with growth, aggregate demand, social mobility, political outcomes and the design of taxes and transfers.

Instantaneous Forward RateOptionsStocks

The forward interest rate for an infinitesimally short period beginning at a future date, obtained as the limit of the ordinary forward rate as the period shrinks to zero. It equals the negative derivative of the log discount factor with respect to maturity, so the whole discount curve can be rebuilt by integrating it. Heath-Jarrow-Morton style term structure models are written directly in terms of how this curve evolves.

Intellectual CapitalStocks

The knowledge-based assets that generate value for a business but rarely appear on its balance sheet, usually grouped as human capital held in employees' skills, structural capital embedded in processes, software, databases and intellectual property, and relational capital in customer and supplier relationships. Accounting recognises these mainly when purchased, which is one reason the market value of knowledge-intensive companies exceeds book value and why acquisitions of them generate large goodwill balances.

Interest Rate CapOptionsStocks

A series of options that pays the holder whenever a reference floating rate fixes above an agreed strike, with each payment calculated on a notional amount for the length of the period. A floating-rate borrower buys one so that if rates rise the cap payments offset the extra interest, leaving an effective ceiling on borrowing cost while keeping the benefit if rates fall. The premium is paid up front and each individual option in the series is called a caplet.

Interest Rate FloorOptionsStocks

A series of options paying the holder whenever a reference floating rate fixes below an agreed strike, with each payment calculated on a notional amount for the period. A lender or a holder of floating-rate assets buys one to set a minimum on the interest received. Each component option is a floorlet, and buying a floor while selling a cap at a higher strike creates a collar that confines the effective rate to a band for little or no net premium.

Investment AssetStocks

In derivatives pricing, an asset held by a significant number of participants purely for investment rather than for use, such as gold, silver, shares and bonds. The distinction matters because arbitrage between spot and forward markets only works when holders will lend or sell their holdings against a forward repurchase, which fixes the forward price at spot compounded at the financing rate less any income. Assets held for consumption, such as oil or copper, need not satisfy that equality.

instrument independenceStocks

A central bank's freedom to choose how to reach an objective set for it by government, deciding interest rates, asset purchases and operational settings without needing approval. It is the standard modern arrangement: the elected authority fixes the inflation target and the central bank alone chooses the actions used to meet it, reporting on performance afterwards. The design is intended to remove any incentive to loosen policy for short-term political gain while keeping the objective itself democratically determined.

intermediate-termStocks

A maturity band between short and long dated instruments, applied by convention to bonds maturing in roughly three to ten years and to holding periods of similar length. The boundaries are not fixed by any rule, so each index provider or fund states its own range. The band matters because interest rate sensitivity rises with maturity while the yield pickup flattens: securities here carry noticeably more duration than money market instruments without the price swings of thirty year debt.

International Banking Facilities(IBF) Stocks

Separate sets of accounts that banks in the United States may establish to book deposits from and loans to foreign customers, exempt from domestic reserve requirements and from certain state and local taxes. Authorized in 1981, they allowed institutions to conduct eurodollar business onshore rather than through offshore branches, competing with the Caribbean and London markets. They are segregated books rather than separate legal entities, and transactions with United States residents are prohibited so the domestic monetary framework is unaffected.

international reservesStocks

Foreign currency assets a central bank holds and can deploy to settle external obligations or to intervene in the exchange market, typically government securities of major issuers, deposits with other central banks, gold, and the reserve position and special drawing rights held at the International Monetary Fund. They matter because they determine how long a country can defend a peg or meet foreign currency debt if capital inflows stop, which is why adequacy is judged against short-term external debt and import cover.

IRS Form 4868Stocks

The United States form an individual files to obtain an automatic extension of time to file a federal income tax return. It is not a request that can be denied: submitting it by the original due date grants the extension without explanation. The extension applies to filing only and not to payment, so any balance owed still accrues interest and possible late-payment penalties from the original date. Filers therefore estimate the liability and remit it with the form. The length of the extension and the relevant due dates are set by the IRS.

IRS Publication 15(Circular E, Employer's Tax Guide) Stocks

The Employer's Tax Guide, the IRS publication explaining an employer's federal payroll obligations in the United States. It covers who counts as an employee, how to determine and withhold income tax using the current withholding methods, the employer and employee shares of Social Security and Medicare tax, deposit schedules and the rules determining which schedule applies, and the returns used to report each amount. Rates, wage bases and deposit thresholds are revised annually, so the current-year edition is the operative one, with companion publications covering specialized situations.

IRS Publication 525Stocks

The IRS guide to Taxable and Nontaxable Income, explaining what a United States individual must include in gross income and what may be left out. It works through wages and fringe benefits, tips, business and investment income, retirement distributions, cancelled debt, legal settlements, prizes, bartering, scholarships and recoveries of previously deducted amounts. It is the reference used when income arrives in a form other than a routine wage or interest payment, since inclusion often depends on the reason for the payment rather than on its label. The IRS revises it annually.

IRS Publication 527Stocks

The IRS guide to Residential Rental Property, covering how a United States taxpayer reports income and expenses from renting out a dwelling. It explains which costs are currently deductible and which must be capitalized and depreciated, the recovery period and method for residential buildings, how to allocate between rental and personal use for a home used both ways, and the treatment of a property rented for only a few days in a year. It also covers the passive activity and at-risk limits that can defer losses into later years.

IRS Publication 535Stocks

The IRS guide to Business Expenses, explaining which costs a United States business may deduct. Its organizing test is that an expense must be both ordinary and necessary for the trade or business, and it works through employee pay, rent, interest, taxes, insurance, start-up and organizational costs, business use of a home and vehicle, and the line between a currently deductible expense and a capital expenditure recovered over time. The IRS periodically reorganizes its publication series and has folded much of this material into other business tax guides, so the current index should be checked.

IRS Publication 590-BStocks

The IRS guide covering distributions from individual retirement arrangements in the United States, the companion to the publication dealing with contributions. It explains when a withdrawal is taxable, how basis from nondeductible contributions is recovered proportionally, the additional tax on early distributions and the exceptions to it, the qualification rules for tax-free Roth withdrawals, and the life expectancy tables used to compute required minimum distributions for owners and for inherited accounts. Ages, tables and thresholds are set by statute and IRS guidance and are revised periodically.

IRS Publication 970Stocks

The IRS guide to Tax Benefits for Education, explaining the United States tax provisions available to students and families paying for postsecondary study. It covers the education credits and how to choose between them, the treatment of student loan interest, scholarships and fellowship grants, employer-provided educational assistance, qualified tuition programs and Coverdell accounts, and the penalty exception for early retirement withdrawals used for education. It also sets out the coordination rules preventing the same expense from supporting two benefits. Income phase-out ranges are adjusted annually.

IRS Publication 972Stocks

The IRS publication that provided the worksheet for figuring the United States child tax credit, including the phase-out at higher incomes and the calculation of the refundable portion. It has been discontinued: the computation now lives on Schedule 8812, filed with the individual return, and the instructions to that schedule carry the guidance. The publication number still appears in older returns, software and reference material, so it is useful mainly when reading prior-year filings. Credit amounts and thresholds are set by statute and have changed several times.

ISO Currency CodeStocksFutures

A three-letter code from the ISO 4217 standard identifying a currency unambiguously in trading, payments and accounting. The first two letters are normally the country code from ISO 3166 and the third is the initial of the currency name, so the United States dollar is USD and the Japanese yen is JPY, while supranational currencies such as the euro take their own code. The standard also assigns a numeric code and the number of decimal places a currency uses, and precious metals carry codes beginning with the letter X.

Impaired AssetStocks

An asset whose carrying amount on the balance sheet exceeds the amount the business can recover from using or selling it. Accounting standards require a write-down to the recoverable amount, with the shortfall recognized as a loss in the income statement, once a triggering event such as a demand collapse, technology change, physical damage or a sustained fall in market value indicates the problem. Goodwill and indefinite-lived intangibles are tested at least annually. The write-down is a non-cash charge, but it signals that past capital spending will not return what was assumed.

Imperfect CompetitionStocks

Any market structure in which at least one condition of perfect competition fails, so sellers face a downward-sloping demand curve and can influence price rather than accept it. The failing conditions are typically a small number of sellers, differentiated products, barriers to entry, or unequal information. Monopoly, oligopoly and monopolistic competition are its main forms. Firms in such markets earn a margin over marginal cost, and that margin is precisely what equity investors call pricing power, which is why competitive structure sits at the centre of durable profitability analysis.

Implied RateOptionsStocks

An interest rate backed out of the prices of two related instruments rather than quoted directly. The common case is the forward or futures market: the difference between a spot price and a forward price, annualized over the period between them, implies the net cost of carrying the asset, which for a currency pair is the interest rate differential between the two currencies. Comparing the implied figure with the cash market rate shows whether the arbitrage relationship holds, and a persistent gap points to funding constraints, credit risk or capital controls.

ImprestStocks

A fixed-balance cash arrangement used to control small payments. A set amount is advanced to a custodian, disbursements are made from it against vouchers, and the fund is periodically topped up by exactly the total disbursed, restoring the original balance. At any moment cash on hand plus supporting vouchers must equal that fixed amount, which makes the account self-checking and any shortfall immediately visible. Petty cash is the familiar example, and the same principle is applied to branch floats, payroll clearing accounts and travel advances.

In SpecieStocks

A transfer made in the assets themselves rather than in cash. Moving a portfolio between custodians this way re-registers the existing holdings in the new account, so nothing is sold and no bid-offer spread or commission is paid on a round trip out of and back into the market. The consequences are tax and timing: because there is no disposal, an unrealized gain is not crystallized, and the holder stays exposed to price moves throughout rather than sitting in cash. Funds also use the method for large redemptions, delivering securities instead of proceeds.

In-House FinancingStocks

Credit provided directly by the seller of a good rather than by a bank or an independent lender, so one company both makes the sale and holds the receivable. Car dealers, equipment manufacturers and furniture retailers use it to close sales that outside lenders would decline, and the finance arm can become a substantial profit centre in its own right. The trade-off is credit exposure on the balance sheet: the seller carries default risk and funding cost, and reported revenue growth can outrun cash collection if underwriting standards loosen.

Income AnnuityStocks

An insurance contract bought with a lump sum that converts it into a stream of payments for a set term or for life. An immediate version starts paying within about a year of purchase, while a deferred version begins at a chosen future date and pays more per dollar because of the delay and the mortality credits accumulated in the meantime. Payment size depends on the amount paid, the annuitant's age, prevailing interest rates and the options chosen, such as survivor benefits or inflation adjustment. Payments depend on the insurer's ability to meet its obligations.

IncorporationStocks

The legal act of forming a corporation, creating an entity whose existence is separate from that of its owners. It is completed by filing a charter document with a state or national authority, adopting bylaws, issuing shares and appointing directors. The separation produces limited liability, so shareholders normally risk only what they invested, and perpetual existence, so the entity survives changes in ownership. It also brings ongoing obligations: separate tax filings, corporate formalities and record-keeping, and in most jurisdictions taxation at the entity level unless a pass-through election is available.

Incremental Cash FlowStocks

The change in a company's total cash flow caused by taking a project, which is the only cash flow belonging in that project's valuation. It equals cash flow with the project minus cash flow without it, so it captures new revenue, new operating costs, taxes, working capital changes and capital spending, plus any effect on existing products. Sunk costs are excluded because they occur either way, the opportunity cost of resources already owned is included, and cannibalization of existing sales is subtracted rather than ignored.

Incremental Cost of CapitalStocks

The rate a company must pay to raise the next tranche of financing, as opposed to the average rate it pays on capital already outstanding. It rises as leverage increases, because lenders demand more for a weaker claim and equity holders demand more for higher financial risk, and it can jump at thresholds such as a covenant limit or a ratings downgrade. Capital budgeting uses this forward-looking rate rather than the historical weighted average, since the historical figure reflects terms that are no longer available.

Indemnity InsuranceStocks

Coverage that reimburses the policyholder for a loss actually suffered, restoring the financial position rather than paying a preset sum. Because payment is tied to proven loss, the contract includes rules against profiting from a claim: deductibles, policy limits, proof of loss and, where several policies apply, contribution between insurers. Professional forms cover claims arising from advice or services, and in health insurance the term describes older plans reimbursing a share of billed charges instead of contracting with a network. It contrasts with valued and parametric policies, which pay a fixed or index-linked amount.

Indentured ServitudeStocks

A historical labour arrangement in which a person contracted to work for a fixed number of years in exchange for something paid up front, most often passage to a colony, and was bound to the holder of the contract until the term was served. The contract itself was transferable, so the obligation could be bought and sold. It is now prohibited as a form of forced labour under United States law and international conventions. The phrase survives in finance as a description of terms so restrictive that a borrower's future income is effectively pledged.

Information Coefficient(IC) Stocks

A measure of forecasting skill, defined as the correlation between predicted returns and the returns that actually occurred across a set of securities. Zero means the forecasts carry no information, and realized values are small: skilled managers typically produce coefficients well below 0.1 on individual predictions. It appears in the fundamental law of active management, which approximates the information ratio as this coefficient multiplied by the square root of breadth, the number of independent bets taken per period. The law makes explicit that weak skill applied often can rival strong skill applied rarely.

Inheritance TaxStocks

A tax levied on what a beneficiary receives from a deceased person's estate, assessed on the recipient rather than on the estate itself. Rates and exemptions usually depend on the relationship: spouses and often children receive generous exemptions or full relief, while distant relatives and unrelated beneficiaries face higher rates. It differs from an estate tax, which is charged to the estate before distribution and depends on total value rather than on who inherits. In the United States it exists only in a small number of states, and thresholds are set by each jurisdiction.

InsiderStocks

Under United States securities law, a person whose relationship to an issuer gives access to material information the public does not have. Section 16 defines a reporting class consisting of directors, designated officers and beneficial owners of more than ten percent of a registered class of equity, who must disclose their transactions and surrender short-swing profits. A broader temporary category covers anyone receiving confidential information in confidence, such as lawyers, bankers and consultants. Membership imposes a duty either to disclose the information or to abstain from trading on it.

Institute of Management Accountants(IMA) Stocks

A professional association for accountants and finance professionals working inside organizations rather than in public audit practice. It administers the Certified Management Accountant credential, which tests financial planning, performance analysis, cost management, internal controls and decision analysis across two examination parts and requires relevant experience and continuing education. It also publishes a statement of ethical professional practice and technical guidance on costing methods. Its focus on internal decision support distinguishes it from bodies centred on external financial reporting and assurance.

Intangible Personal PropertyStocks

Property with no physical substance and not attached to land, deriving its value from the rights it conveys. Shares, bonds, bank deposits, patents, trademarks, copyrights, franchise rights, goodwill and contractual claims all fall in the category. It is distinguished from tangible personal property, which is movable and physical, and from real property, which is land and whatever is permanently affixed to it. The classification drives practical outcomes: which jurisdiction may tax the asset, how it passes at death, how it is valued, and what steps perfect a lender's security interest.

Inter-American Development Bank(IDB) Stocks

A multilateral development bank founded in 1959 that lends to governments and private borrowers in Latin America and the Caribbean. It is owned by member countries, including both borrowing members in the region and non-borrowing members that contribute capital, and it funds itself mainly by issuing bonds in international markets against that callable capital and its own credit standing. Lending supports infrastructure, health, education, climate and institutional reform, usually accompanied by technical assistance and policy conditions. A private sector arm and a grant facility sit alongside the sovereign lending window.

Interest rate effectStocks

One of the reasons the aggregate demand curve slopes downward. A higher general price level raises the amount of money households and firms need for transactions, and with the money supply fixed that extra demand for money pushes interest rates up. Higher rates make borrowing more expensive, which reduces business investment and interest-sensitive consumer purchases such as housing and vehicles, so total output demanded falls. It is also called the Keynes effect, and it works alongside the wealth effect and the international trade effect in producing the same slope.

Internal Revenue Code(IRC, Title 26) Stocks

The body of United States federal tax law, codified as Title 26 of the United States Code. It sets out income, estate, gift, employment and excise taxes, and its sections are the standard reference point for a rule, so a provision is cited by section number rather than by the statute that created it. Congress amends it through legislation, the Treasury issues regulations interpreting it, and the IRS administers it and publishes rulings and guidance. Courts resolve disputes over meaning, which is why a section, its regulations and case law are read together.

InternationalStocksFutures

In fund and index naming, a label meaning that holdings are drawn from outside the investor's home country. An international equity fund sold in the United States therefore excludes American companies, while a global or world fund covers the whole opportunity set including the home market. The distinction matters for portfolio construction because pairing a domestic fund with an international one avoids double counting, whereas pairing a domestic fund with a global one leaves an unintended overweight at home. Regional variants narrow it further, and developed or emerging qualifiers restrict which markets are eligible.

International Fisher EffectStocksFutures

A parity condition stating that the expected change in a spot exchange rate between two currencies equals the difference in their nominal interest rates. The logic chains two ideas: nominal rates embed expected inflation, and purchasing power parity ties inflation differences to currency moves, so the currency with the higher nominal rate is expected to depreciate by roughly that gap. If it held exactly, borrowing in a low-rate currency to lend in a high-rate one would earn nothing once currency moves are counted. Empirically it fails over short horizons, which is what the carry trade exploits.

Intertemporal ChoiceOptionsStocks

The decision about how to allocate consumption and resources across different points in time, which is the foundation of saving, borrowing and investing. Standard models express it as maximizing utility over a lifetime subject to a budget constraint, with future satisfaction discounted at a rate capturing impatience, and the interest rate setting the price of moving purchasing power between periods. Observed behaviour departs from the constant-rate assumption: people discount the near future far more steeply than the distant future, a pattern called present bias that helps explain undersaving and procrastination.

IntestateStocks

The condition of dying without a valid will, in which case state or national succession statutes decide who inherits. The statutory order typically favours a surviving spouse and children first, then parents, siblings and more distant relatives, with the estate passing to the government only if no qualifying relative exists. A court appoints an administrator to gather assets, pay debts and distribute the remainder, a role the deceased would otherwise have filled by naming an executor. Assets with a beneficiary designation or a survivorship title pass outside the process regardless, which is why account paperwork can override the statutory scheme.

Investment BankingStocks

The business of helping companies, governments and funds raise capital and execute transactions, as distinct from the deposit-taking and lending done by commercial banks. Core activities are underwriting new equity and debt issues, advising on mergers, acquisitions, divestitures and restructurings, arranging leveraged loans and private placements, and providing sales, trading and research to institutional clients. Revenue comes from fees on completed deals and from spreads on securities distributed. Because one firm can advise, finance and trade in the same name, conflict controls and information barriers are central to how the business is regulated.

Investment CenterStocks

A responsibility unit within a company whose manager controls revenue, costs and the capital employed in the unit, and is therefore evaluated on the return earned on that capital rather than on profit alone. Typical measures are return on investment and residual income, which subtracts a charge for capital used before crediting the manager with a result. It sits above a profit centre, judged on earnings only, and a cost centre, judged on spending. The design matters because measuring on a ratio alone can discourage a manager from accepting an acceptable project that dilutes the unit's average.

Investment ObjectiveStocksCrypto

A written statement of what a portfolio is meant to achieve, expressed in terms of return, risk tolerance, time horizon, income needs, liquidity and any constraints such as tax position or excluded holdings. For a fund it appears in the prospectus and is legally meaningful, since the manager must invest consistently with it and material changes may require shareholder approval. For an individual it anchors an investment policy statement, providing the benchmark against which allocation decisions and later drift are judged rather than a prediction of results.

Iranian RialStocks

The official currency of Iran, issued by the Central Bank of the Islamic Republic of Iran. Prices in daily use are commonly quoted in toman, an informal unit equal to ten rial, so a stated figure can differ from the official one by a factor of ten. Persistent inflation and international sanctions have left the currency with multiple exchange rates, an official rate used for approved imports and a parallel market rate, and its convertibility and use in cross-border settlement are heavily restricted.

Irrevocable BeneficiaryStocks

A named recipient of a life insurance policy or annuity whose designation cannot be changed, and whose rights cannot be reduced, without that person's written consent. The status also restricts the owner from surrendering the contract, taking policy loans or assigning it while the designation stands. It is used where the payout secures an obligation, such as a divorce settlement requiring coverage for a former spouse or children, or a business buy-sell agreement, because a revocable designation would let the owner quietly redirect the proceeds.

Isoquant CurveStocksCrypto

A line showing every combination of two inputs, typically labour and capital, that produces the same quantity of output. It is the production counterpart of an indifference curve, and it slopes downward because using less of one input requires more of the other. Its slope is the marginal rate of technical substitution, the rate at which one input can replace the other while holding output constant, and it is convex because substitution grows harder as one input becomes scarce. Curves further from the origin represent higher output.

IRS Publication 519(U.S. Tax Guide for Aliens) Stocks

The Internal Revenue Service guide explaining how United States tax law applies to individuals who are not citizens. It sets out the tests deciding whether a person is a resident alien for tax purposes, the green card test and the substantial presence test, and how a dual-status year is handled. It then covers which income is taxed, the source rules deciding whether income is domestic or foreign, available deductions and credits, treaty relief, and filing requirements. Like all such publications it is guidance rather than law.

ISM Manufacturing Index(ISM Manufacturing PMI) StocksCrypto

A monthly diffusion index of United States factory activity compiled by the Institute for Supply Management from a survey of purchasing managers. Respondents report whether new orders, production, employment, supplier deliveries and inventories rose, fell or were unchanged, and each component is converted to the share reporting an increase plus half the share reporting no change. The headline is a weighted composite of the five, where readings above 50 indicate expansion from the prior month and below 50 contraction. It is released early in the month, which is why markets follow it.

Imperfect MarketStocksCrypto

A market in which one or more conditions required for perfect competition fail, so prices do not fully reflect costs and preferences. The failures include a small number of buyers or sellers with power over price, differentiated products, barriers to entry, transaction costs, and information held by one side and not the other. Most real markets are imperfect to some degree. The consequence is that quantity traded differs from the level maximising total surplus, which is the standard economic case for competition policy and disclosure rules.

Implicit CostOptionsStocks

The value of a resource a firm already owns that is consumed by using it in one activity rather than the next best alternative. Examples are the salary an owner-operator forgoes by working in their own business, the rent not collected on a building the firm occupies, and the return not earned on capital tied up in inventory. Such costs never appear in the accounts because no payment is made, which is why accounting profit exceeds economic profit: economic profit subtracts both explicit and implicit costs.

Import Substitution Industrialization(ISI) StocksCrypto

A development strategy replacing imported manufactured goods with domestic production, protected by tariffs, quotas, licensing and subsidised credit while local industry builds capacity. It was widely adopted in Latin America and parts of Asia and Africa in the mid twentieth century. Domestic manufacturing typically expands at first, then stalls where the home market is too small to reach efficient scale and protection removes the pressure to cut costs, often alongside overvalued exchange rates and chronic current account deficits. Most adopters later shifted toward export-oriented policies.

Income EffectOptionsStocks

The change in the quantity of a good a consumer buys that results purely from the change in real purchasing power when a price moves, holding relative prices constant. A fall in the price of something a household buys makes the household better off overall, and it spends part of that gain across its whole basket. For normal goods this reinforces the substitution effect and the downward-sloping demand curve. For inferior goods it works against it, and where it dominates the result is a Giffen good.

Income Tax PayableStocks

A current liability on the balance sheet representing income tax a company owes to tax authorities for the current and prior periods but has not yet paid. It is measured using tax rates and laws enacted or substantively enacted at the reporting date, and it falls as instalments are remitted. It differs from deferred tax, which arises from timing differences between accounting and tax treatment of items and reverses in later periods. Because tax rules differ from accounting rules, this balance rarely equals the tax expense reported in the income statement.

Increasing returns to scaleStocks

A production relationship in which raising every input by the same proportion raises output by more than that proportion, so doubling labour, capital and materials produces more than double the output. It arises from specialisation, from indivisible fixed assets spread over more units, and from network or learning effects. Where it holds, average cost falls as scale grows, which favours large producers and can lead to concentration or natural monopoly. It contrasts with constant and decreasing returns to scale.

Incumbency Certificate(certificate of incumbency) Stocks

A document issued by a corporation's secretary listing the current directors and officers, the offices they hold and usually specimen signatures, certifying who is authorised to sign on the company's behalf. Banks, counterparties, registrars and notaries request it before accepting an executed contract, opening an account or completing a transfer, so they can verify the signer's authority as of a stated date. It is a point-in-time statement, which is why recipients require a recently issued one rather than relying on an old copy.

Indirect LoanStocks

A loan arranged through an intermediary rather than directly between borrower and lender, most commonly consumer credit originated at the point of sale. A car dealer takes the application, submits it to several lenders, and assigns the resulting contract to whichever one buys it, often adding a margin to the rate the lender quoted. The borrower's contract then sits with the assignee. The term also covers loans a bank acquires by purchasing paper another originator underwrote, which moves the credit assessment away from the holder.

Industrial Goods SectorStocks

The group of listed companies making and selling capital goods and related services to other businesses rather than to consumers, including machinery, aerospace and defence, building products, electrical equipment, construction and engineering, commercial services and transport. Demand is driven by customers' capital spending, which is postponable, so revenue and margins swing more than the wider market across the business cycle. Order backlog, book-to-bill ratios and capacity utilisation are the indicators most used to read where the group sits in that cycle.

Inelastic demandStocks

Demand whose quantity changes less than proportionally when price changes, so the price elasticity of demand is below one in absolute value. A 10 percent price rise cuts volume by less than 10 percent, which means total revenue rises when the seller raises price. Necessities, goods with few substitutes, habit-forming products and items taking a small share of a buyer's budget behave this way. Elasticity generally increases with the time buyers have to find alternatives, so demand that is inelastic in the short run can become elastic later.

Infant-Industry TheoryStocksCrypto

The argument that a new domestic industry may need temporary protection from established foreign competitors until it reaches the scale and accumulated experience needed to compete unaided. Protection takes the form of tariffs, quotas or subsidies, justified on the grounds that learning by doing lowers future costs and that private capital will not fund the loss-making early years. The standard objection is political rather than analytical: protection creates a constituency that resists its own removal, so temporary support tends to become permanent.

Inherent RiskStocksCrypto

The chance that a financial statement assertion is materially misstated before any internal controls the entity has in place are considered. Auditors assess it from the nature of the account, the complexity of transactions, the degree of judgment in estimates, susceptibility to fraud or theft, and pressure on management to hit targets. In the audit risk model it combines with control risk and detection risk, and a higher assessment leads the auditor to gather more or better evidence rather than to change the reported amount.

Institute for Supply Management(ISM) Stocks

A United States professional association for supply management and procurement practitioners, founded in 1915 and best known for the monthly business surveys it publishes. Its manufacturing and services reports gather responses from purchasing executives on orders, production or business activity, employment, deliveries, inventories and prices, and convert them into diffusion indices where a 50 reading separates expansion from contraction. It also administers professional certifications. Its releases are watched because they arrive before most official statistics covering the same month.

Insufficient Funds(non-sufficient funds) Stocks

A condition in which the balance available in a deposit account is less than the amount of a presented cheque, card transaction or automated debit. The bank either returns the item unpaid, charging a returned item fee and leaving the payee unpaid, or pays it into overdraft and charges an overdraft fee. Which happens depends on the account terms and, for one-time debit card transactions in the United States, on whether the customer opted into overdraft coverage. Repeated returned items can lead to account closure.

Insurance ClaimStocks

A formal request an insured makes to an insurer for payment under a policy after a covered loss. The insurer opens a file, assigns an adjuster, verifies the policy was in force and the cause of loss is covered, estimates the amount of damage, applies the deductible and any policy limit, then pays the insured or a third party. Claims history feeds future pricing, so a paid claim can raise renewal premiums, and disputes are resolved through appraisal, mediation or litigation depending on the policy terms.

Insurance PremiumStocks

The amount an insured pays an insurer for coverage over a stated policy period, quoted per year, per month or per unit of exposure such as per thousand of coverage. It is built from an expected loss cost estimated from claims experience on similar risks, a loading for the insurer's expenses and commissions, an allowance for profit and for the cost of holding capital, and any credit for investment income earned while reserves are held. Underwriting then adjusts the base rate for the specific risk's characteristics.

Interbank DepositsStocks

Deposits one bank places with another, usually unsecured and for short maturities ranging from overnight to a few months. Banks holding surplus reserves lend them to banks that are short, which is how liquidity is redistributed across the system and how reference rates for that market are set. Because the exposure is unsecured it is priced on the borrower's credit standing and can disappear quickly under stress. Withdrawal of this funding is a standard early symptom of a banking crisis, so regulators monitor reliance on it.

Interim Statement(interim report) Stocks

A financial report covering a period shorter than a full financial year, most often a quarter or a half year. It typically presents condensed statements with fewer notes than the annual report and is reviewed by auditors rather than fully audited, which is why it can be issued much sooner after period end. Accounting standards set out how to treat costs that fall unevenly through the year, such as seasonal expenses and income tax, so that results are not distorted by timing alone.

Internal Growth Rate(IGR) Stocks

The fastest a company can grow using only retained earnings, with no new borrowing and no new equity issued. It is calculated as return on assets multiplied by the retention ratio, divided by one minus that product, where the retention ratio is the share of net income not paid out as dividends. Because it rules out external finance entirely, it sits below the sustainable growth rate, which allows debt to grow in step with equity and therefore holds leverage constant rather than reducing it.

International Accounting Standards(IAS) Stocks

The accounting standards issued by the International Accounting Standards Committee between 1973 and 2001, numbered as IAS statements. When the International Accounting Standards Board replaced that committee it adopted the existing standards, so those not since withdrawn remain in force alongside newer ones issued under the IFRS label. A company reporting under International Financial Reporting Standards therefore applies a mixture of surviving statements from the older series, such as those on inventories and income taxes, and newer statements that replaced others.

International Bank Account Number(IBAN) StocksCrypto

A standardised format for identifying a bank account across borders, defined by an ISO standard and used mainly in Europe and by countries connected to European payment systems. It opens with a two-letter country code and two check digits, followed by a country-specific string containing the bank and branch identifier and the account number, up to a maximum total length. The check digits let a sending system detect a mistyped account before the payment is released, which reduces misdirected transfers and repair fees.

International Bank for Reconstruction and Development(IBRD) Stocks

The original institution of the World Bank Group, created at the 1944 Bretton Woods conference to finance postwar reconstruction and now lending to creditworthy middle-income and some lower-income governments. It funds itself by issuing bonds in international capital markets against capital subscribed and callable by member countries, which supports a high credit rating, and it lends the proceeds at rates close to its own cost of funds. Concessional lending to the poorest countries is handled by its sister institution, the International Development Association.

International Maritime Organization(IMO) Stocks

The United Nations specialised agency setting global standards for the safety, security and environmental performance of merchant shipping. It adopts conventions that member states then enact in national law, covering ship construction and equipment, crew training and certification, pollution from oil, chemicals and garbage, ballast water, and limits on sulphur and greenhouse gas emissions from marine fuel. Its rules move shipping costs and refinery demand, which is why its emissions decisions matter to freight rates and to pricing of fuel oil and distillate.

Internet of Things(IoT) Stocks

The network of physical objects carrying embedded sensors, processing and connectivity that collect and exchange data without a person operating them. Industrial uses include condition monitoring on machinery, tracking of vehicles and containers, metering of utilities, and inventory sensing in warehouses. The commercial value sits in the data stream rather than the device: continuous measurement supports predictive maintenance, usage-based pricing and automated replenishment. The main constraints on deployment are device security, power and connectivity cost, and fragmented standards.

Intraday Momentum Index(IMI) StocksCrypto

A technical indicator combining candlestick construction with a relative strength calculation, measuring gains and losses from open to close rather than from one close to the next. Over a lookback window it sums the open-to-close moves on up days and on down days, then expresses the up sum as a percentage of the total, producing a value between 0 and 100. Readings near the upper and lower bounds are read as overbought and oversold. It is aimed at intraday traders because it uses each session's own range.

IntrapreneurStocksCrypto

An employee who develops a new product, service or business line inside an established company, taking on the initiative and problem-solving of a founder while using the employer's capital, brand and distribution. The employer bears the financial downside, and the upside for the employee is usually career advancement or a bonus rather than equity. Companies formalise the role through internal venture units, innovation budgets and time allocations. The recurring difficulty is that parent-company reporting and approval processes are built for existing businesses, not uncertain new ones.

Inventory Write-OffStocks

An accounting entry removing inventory from the balance sheet entirely because it has no remaining value, for example goods that are obsolete, spoiled, damaged or stolen. The carrying amount is credited out of inventory and charged to expense, usually within cost of goods sold or to a separate loss line where the amount is material. It differs from a write-down, which reduces the carrying amount to a lower net realisable value while the goods remain saleable. Both cut reported profit in the period recognised without an immediate cash outflow.

Investigational New Drug(IND) Stocks

An application a sponsor files with the United States Food and Drug Administration to begin testing an experimental drug in humans, which is otherwise prohibited for an unapproved compound shipped across state lines. It submits animal pharmacology and toxicology data, manufacturing information, and the proposed clinical protocol with investigator qualifications. Testing may begin if the agency does not impose a hold within a review window. For investors in development-stage biotechnology companies, clearance is the gate turning preclinical work into a clinical programme.

Investment Advisory Representative(IAR) Stocks

An individual who gives investment advice on behalf of a registered investment adviser firm, as distinct from the firm itself, which holds the registration. Representatives register in the states where they do business, generally by passing a qualifying securities law examination or holding a recognised professional designation, and their records appear in public disclosure databases. Because the firm is a fiduciary, the representative must place client interests ahead of their own and disclose conflicts, which differs from the standard applying to a broker-dealer's registered representative.

Investment ConsultantStocks

An adviser retained by an institution such as a pension plan, endowment, foundation or insurer to help set investment policy, choose asset allocation, select and monitor external managers, and report on results. Compensation is normally a fixed fee or retainer paid by the client rather than by the managers being recommended, which is the structure intended to keep the advice independent. Some firms also offer discretionary implementation, taking the decisions rather than advising on them, which changes the relationship from adviser to fiduciary manager.

Investment MultiplierStocksCrypto

The ratio showing how much total national income rises for each unit of additional investment spending, in Keynesian demand analysis. Spending by one party becomes income to another, who spends part of it again, so an initial outlay circulates. Its size equals one divided by one minus the marginal propensity to consume, equivalently one divided by the marginal propensity to save, so a stronger tendency to spend out of extra income makes it larger. Leakages into imports and taxes pull it below the closed-economy value.

IRMAA(income-related monthly adjustment amount) Stocks

A surcharge added to Medicare Part B and Part D premiums for beneficiaries whose income exceeds published thresholds. It is determined from a prior tax year's modified adjusted gross income, so a one-off income event such as a large Roth conversion or a property sale can raise premiums in a later year.