--- title: "Securities Lending, Borrow Recalls" description: "Securities lending, borrow recalls, and buy-ins explain how U.S. equity markets handle share loans and recall risk for short sellers and long investors." canonical: https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/securities-lending-borrow-recalls-and-buy-ins/ source: "Swoopr Investment: https://www.getswoopr.com" --- ## Direct Answer > **Securities lending** is the temporary transfer of shares from a lender (a broker or institution holding long positions) to a borrower (typically a short seller), in exchange for collateral and a daily borrow fee. A **recall** occurs when the lender demands shares back, for any reason, including a pending sale or corporate action, giving the borrower limited time to return shares or find a replacement loan. If the borrower cannot deliver shares by settlement, the clearing firm executes a **buy-in**: it purchases shares in the open market and charges the cost and any loss to the short seller, regardless of current price. - **Borrow fees matter:** On hard-to-borrow names, annualized borrow rates can reach 20%, 200%+ per year, eroding a short thesis even when price moves are favorable. - **Recalls can be immediate:** A lender can issue a recall with as little as one business day's notice. The borrower must return shares or find a new lender by the deadline. - **Buy-ins are not negotiable:** Under SEC Rule 204, a clearing agency participant with a fail to deliver must close it out by the beginning of regular trading hours on the settlement day after the settlement date, which is T+2 from the trade date under T+1 settlement. Fails from long sales and bona fide market making get until the third consecutive settlement day after the settlement date, and a threshold security fail that persists for thirteen consecutive settlement days must be closed out under Rule 203. - **Long investors bear hidden costs:** Shares held in a margin account can be lent without the holder receiving direct compensation. Manufactured dividends paid by borrowers during a loan receive different tax treatment than qualified dividends paid by the issuer. - **Short interest data lags:** FINRA's bimonthly short interest reports reflect positions as of two settlement dates per month, not real-time borrow conditions. # Securities Lending, Borrow Recalls, and Buy-Ins Short selling depends on borrowed shares. When the loan is recalled or settlement fails, a buy-in can force a position closed at any price. This page explains how securities lending works, what triggers a recall, and how buy-ins are executed under SEC Rule 204. ![Detailed close-up of Indian Rupee banknotes with iconic Gandhi portrait, emphasizing economy and currency themes.](https://www.getswoopr.com/images/hero/markets-execution-clearing-settlement-and-brokerage-mechanics-securities-lending-borrow-recalls-and-buy-ins.webp) *Photo by [Habib](https://www.pexels.com/@habibqnet/) via [Pexels](https://www.pexels.com/photo/india-rupee-banknote-904735/)* ## What This Changes for a Real User ### If you hold long positions in a margin account Your broker's customer agreement almost certainly grants the broker the right to lend shares you hold on margin to short sellers. You continue to receive the economic equivalent of dividends, but if the dividend is paid while shares are out on loan, you receive a **payment in lieu of dividend** from the borrower rather than the actual qualified dividend from the issuer. For U.S. investors, qualified dividends are taxed at preferential long-term capital gains rates; payments in lieu are taxed as ordinary income. This substitution can increase your tax bill without changing your cash received. If you hold shares in a **cash account**, your broker needs a separate written agreement with you before it can borrow your fully paid shares, as SEC Rule 15c3-3 and FINRA Rule 4330 require. Some brokers offer voluntary share-lending programs that pay you a portion of the borrow fee; whether this is worthwhile depends on the rate and the tax consequences of participation. ### If you are short a hard-to-borrow stock Your effective holding cost is not just the capital you deploy or the overnight interest on the margin loan, it also includes the **borrow fee**, which accrues daily and can change without advance notice. When borrow becomes scarce (for example, around a major catalyst or a squeeze), rates can spike overnight from 5% annualized to 80% annualized. A borrow recall forces you to either close the short or find a replacement lender, typically within one business day. If no replacement is available and you fail to deliver, a buy-in will close you out, at whatever the market price happens to be that morning. ### If you are constructing a short-based strategy Borrow availability is part of position sizing, not an afterthought. A short that cannot be maintained through a multi-month thesis because of recall risk or cost-of-carry is a different bet than a short that borrows at 1% annualized in ample supply. Research that compares a security's fundamental value to its market price without accounting for realistic borrow availability and cost is incomplete. ## Mechanics and Definitions ### The securities lending transaction When a short seller wants to short 1,000 shares of a stock. The broker must first locate shares to borrow. This is called the **locate** requirement. Under SEC Regulation SHO, a broker-dealer must have reasonable grounds to believe shares can be delivered by settlement before accepting a short sale order (with limited exceptions for market makers). After locating shares. The broker arranges a **securities loan agreement** with the lender, often another customer's margin account, the broker's own inventory, or a third-party institutional lender. The borrower posts **collateral**, typically cash equal to 102%, 105% of the market value of the borrowed shares, though non-cash collateral (Treasury securities) is also used in institutional lending. The lender earns a daily rebate on the cash collateral (the **rebate rate**). When short sellers borrow hard-to-borrow shares, the rebate rate falls below the overnight federal funds rate or goes negative (a **negative rebate**), meaning the borrower effectively pays a fee to the lender. That net cost is the **borrow fee** or **borrow rate**. ### Easy-to-borrow versus hard-to-borrow Brokers publish daily **easy-to-borrow (ETB)** lists: securities where ample supply exists and the borrow rate is low (often below 1% annualized). Securities not on this list, usually because short interest is high relative to float, shares are thinly traded, or float is physically restricted, are **hard-to-borrow (HTB)**. Borrow rates on HTB names must typically be requested and confirmed before a short order is accepted, and the rate can change between the time a locate is obtained and the next morning's rate reset. | Term | Definition | Who it affects | | --- | --- | --- | | Locate | Broker confirmation that shares can be borrowed before a short sale is accepted. | Short seller; broker | | Borrow rate | Annualized daily cost charged to the borrower for maintaining a short position; expressed as a percentage of market value. | Short seller | | Rebate rate | Rate paid by the lender to the borrower on cash collateral; when negative, the borrower pays the lender (the negative rebate is the borrow cost). | Both parties | | Payment in lieu | Cash paid by the borrower to the lender in place of dividends that are paid on shares while out on loan; taxed as ordinary income rather than a qualified dividend. | Long investor in margin account | | Recall | Lender's demand for return of borrowed shares, typically within one business day. | Short seller; lender | | Buy-in | Mandatory purchase of shares by the clearing firm or broker to close a fail-to-deliver position; cost charged to the party that failed to deliver. | Short seller who fails to deliver | | Fail to deliver (FTD) | When a seller (including a short seller) does not deliver shares to the buyer by the settlement date. | Short seller; clearing firm | | Threshold security | A security with cumulative fails exceeding 0.5% of shares outstanding for five or more consecutive settlement days; listed on a regulatory threshold securities list. | All market participants | ### How recalls work A lender can recall borrowed shares at any time, for any reason, most commonly because the lender wants to sell the shares, needs them for a corporate action (e.g., a rights offering requiring ownership verification), or faces their own counterparty obligations. Upon recall, the borrower must either: (1) return the shares by purchasing them in the open market, effectively closing the short; or (2) find a replacement lender willing to provide equivalent shares under a new loan agreement. The timeline for compliance is typically **one business day**, though this can vary by agreement. If the borrower is unable to arrange a replacement borrow or cover the short, the shares are not returned on time, generating a **fail to deliver** at the clearinghouse (DTCC/NSCC for U.S. equities). ### How buy-ins work under SEC Rule 204 SEC Rule 204 (part of Regulation SHO) requires that a participant of a registered clearing agency must close out a fail to deliver by no later than the beginning of regular trading hours on the settlement day following the settlement date. Under the current T+1 settlement cycle (effective May 28, 2024). This is **T+2** from the original trade date for most equity securities, settlement at T+1 plus one additional settlement day. Long sales and bona fide market-making fails get an extended window of three settlement days following the settlement date. For threshold securities, Rule 203(b)(3) separately requires a participant to close out a fail that has persisted for thirteen consecutive settlement days, and under Rule 204(b) a participant that misses its Rule 204(a) deadline may not accept further short sales in that security without first borrowing or arranging to borrow it. A buy-in is executed by the broker or clearing firm at the prevailing market price, without regard to the short seller's cost basis or desired exit price. The short seller bears the difference between their original short sale proceeds and the buy-in price, plus any applicable commissions and fees. ## Worked Example: A Recall on a Hard-to-Borrow Name *This is a hypothetical scenario for educational purposes. Numbers are illustrative and do not represent actual trading results.* ![stock exchange trading floor Securities Lending Borrow recall hard](https://www.getswoopr.com/images/accent/markets-execution-clearing-settlement-and-brokerage-mechanics-securities-lending-borrow-recalls-and-buy-ins-accent-1.webp) *Photo by [Tumisu](https://pixabay.com/users/Tumisu-148124/) via [Pixabay](https://pixabay.com/photos/loan-money-lend-borrow-euros-500-8012425/)* ### Setup (assumptions stated explicitly) - Stock ticker: hypothetical "XYZ", a small-cap biotech, 12 million share float. - Short seller (call them Trader A) shorts 5,000 shares at $40.00 per share on Day 1, after receiving a locate at a borrow rate of 15% annualized. - Proceeds: $200,000. Collateral posted: 102% × $200,000 = $204,000 (cash). - Daily borrow cost: $200,000 × 15% / 365 = approximately $82 per day. - By Day 15, XYZ has moved against Trader A, trading at $45.00; XYZ is now on the threshold securities list and borrow rate has spiked to 80% annualized. - New daily borrow cost at $45: $225,000 × 80% / 365 = approximately $493 per day. ### Recall event On Day 16, Trader A receives a recall notice from their broker: the institutional lender that provided the original borrow needs the 5,000 shares returned by the next business day (Day 17) to deliver shares from their own sale. Trader A has two options: 1. **Cover the short:** Buy 5,000 shares of XYZ in the open market at or near $45.00, returning shares to the lender and closing the position. Loss on the short: (45.00 minus 40.00) × 5,000 = $25,000, plus about $1,640 of borrow fees (14 days at about $82 per day and Day 15 at about $493). Total loss approximately $26,600. 2. **Find a replacement borrow:** Trader A contacts their prime broker to locate a new lender. The prime broker confirms replacement borrow is available, but only at 90% annualized (up from 80%), and only for 2,000 of the 5,000 shares. Trader A must still cover 3,000 shares to return to the original lender, and the remaining 2,000 are rolled to the new lender at 90%. ### If the buy-in is triggered Suppose Trader A fails to return all 5,000 shares by Day 17. The clearing firm registers 5,000 shares as a fail to deliver. Under Rule 204, the failing position must be closed out by the beginning of regular trading hours on the settlement day after the settlement date, which is the opening of trading on Day 18. The buy-in occurs at the market open, where XYZ opens at $48.00 due to overnight news. The buy-in price is $48.00 × 5,000 = $240,000. Trader A's original short proceeds were $200,000. The net loss on the position alone is $40,000, before adding in 17 days of borrow fees and any commissions on the buy-in. The buy-in is executed by the broker, not Trader A, and Trader A has no control over timing or price. ### What the example shows The risk in a short position extends well beyond the directional move. Rising borrow costs, a sudden recall, and an unfavorable buy-in price can each independently add to losses. In this example, a $5-per-share loss at the Day 15 price of $45.00 became an $8-per-share loss at the $48.00 buy-in price, before borrow fees and commissions, which add to the total. A short thesis that is correct on fundamentals can still be financially painful if the borrow infrastructure collapses at the wrong moment. ## How to Evaluate Borrow Risk Before Entering a Short ### Step 1: Confirm the locate and current borrow rate Before placing a short sale order, confirm that a locate is available and record the current borrow rate. Do not rely on yesterday's rate, HTB rates reset daily and can change intraday if the broker's inventory shifts. Ask your broker whether the rate is "confirmed for today" or "indicative." ### Step 2: Check short interest relative to float FINRA publishes short interest data bimonthly (reflecting settlement dates around the 15th and end of each month). If short interest is already a high percentage of float, above 20%, 30% is often cited as a warning threshold, though there is no fixed rule, borrow availability can deteriorate quickly if more sellers pile in. Check the FINRA short interest data for your target security and note the trend over recent reporting periods. ### Step 3: Review the threshold securities list FINRA and exchanges publish daily threshold securities lists under Rule 203 of Regulation SHO. Appearance on this list means the security has had persistent fails, which can precede buy-in action or regulatory attention. It does not mean a buy-in is imminent, but it raises recall risk and may indicate that borrow is difficult to maintain. ### Step 4: Model total holding cost Compute the break-even borrow cost for your thesis. If you expect a stock to fall from $40 to $28 (a 30% move) but borrow costs 60% annualized, you need the position to work within approximately six months just to cover carry, sooner if rates spike further. Write this calculation down before entry, not after a loss forces the question. ### Step 5: Know your broker's recall notice window Broker customer agreements vary in how much notice they are required to give you before a recall. Some provide one business day; others may provide less. Read your agreement and ask your broker what their typical practice is for recalls on HTB securities. If you hold a significant short in a name where recall is plausible, have a contingency plan: either identify a replacement lender in advance or set a price target at which you will voluntarily cover. ## Failure Modes: What Can Go Wrong - **Borrow rate spikes overnight.** A rate that was acceptable when the position was opened can become prohibitively expensive after a catalyst event or surge in short interest. There is no rate cap; the borrower must pay the prevailing rate or cover. - **Recall timing is adversarial.** Recalls frequently arrive at the worst moments, during squeezes, around earnings, or when the stock has moved sharply against the short. This is not coincidence; the same events that move a stock sharply against short sellers also motivate lenders to liquidate (or enable forced covering), increasing recall pressure exactly when covering is most painful. - **Replacement borrow is unavailable.** On the most squeezed names, no replacement lender exists at any rate. The short seller must cover. This is the mechanism behind a "short squeeze", forced covering creates additional buying pressure, lifting the price further and tightening remaining borrow. - **Buy-in price is unknown in advance.** The clearing firm executes a buy-in at the market open with no guaranteed price limit. Gap-up openings on recall-forced buy-ins can produce execution prices significantly above the prior close. - **Long investors receive unexpected tax treatment.** A shareholder in a margin account who receives a payment in lieu of dividend instead of the actual dividend may not notice the difference on their monthly statement but will face a higher tax bill at year-end. This is not disclosed prominently by most brokers. - **Voluntary share lending programs hide costs.** Some retail broker programs allow customers to earn a portion of borrow fees by lending their shares. The disclosed revenue share is often a small fraction of the gross borrow fee. The actual economics of these programs are not always easy to compare across brokers. - **Locates are not guarantees.** A locate obtained in the morning gives the broker reasonable grounds to accept the short order, but it does not guarantee that borrow remains available indefinitely. If the inventory pool shrinks. The broker may still issue a recall even shortly after a locate was confirmed. ## Risk, Limitations, and When Not to Use This Concept ### What this concept does not tell you Understanding securities lending mechanics does not tell you whether a short thesis is correct. A stock can be expensive to borrow, have high short interest, and still rise significantly before declining. Borrow rate data is not a predictive signal for price direction. Similarly, a buy-in does not mean the underlying thesis is wrong. It means the borrower failed to manage the operational side of the trade. ![Hand holding Bitcoin with an upward cryptocurrency market chart on screen displaying growth.](https://www.getswoopr.com/images/accent/markets-execution-clearing-settlement-and-brokerage-mechanics-securities-lending-borrow-recalls-and-buy-ins-accent-2.webp) *Photo by [Jakub Zerdzicki](https://www.pexels.com/@jakubzerdzicki/) via [Pexels](https://www.pexels.com/photo/hand-holding-bitcoin-over-rising-chart-on-screen-30572214/)* This page also does not address **naked short selling** in detail. Naked shorting, selling short without first locating shares, is prohibited for most market participants under Regulation SHO, with narrow exceptions for bonafide market-making activities. The mechanics described here apply to covered short selling where a locate has been obtained. ### When the standard rules are not sufficient Regulation SHO's close-out requirements apply to U.S. registered clearing agencies. Securities traded on foreign exchanges, some over-the-counter instruments, and certain derivatives have different settlement and close-out frameworks. If you are shorting ADRs (American Depositary Receipts), know that the borrow market for the underlying ordinary shares in the home country may impose additional constraints or different recall timelines that differ from the domestic model described here. ### Fact versus interpretation **Fact:** SEC Rule 204 sets specific close-out deadlines for fails to deliver in U.S. equity securities at registered clearing agencies. **Interpretation:** The existence of high fails-to-deliver in a given security is sometimes cited as evidence of illegal naked short selling. High FTDs can arise from many causes, legitimate market-making fails, settlement timing mismatches, or genuine operational errors, and are not, by themselves, proof of illegal activity. Traders should verify the regulatory basis for any claim about fails before trading on it. ### Counterexample: when borrow recalls do not force covering If a lender recalls shares but the borrower's prime broker has access to additional inventory, from other customers' margin accounts or from securities lending desks at other institutions, the replacement borrow is arranged seamlessly. The short seller may see a higher borrow rate on the new loan but is not forced to cover. Most retail broker recalls for individual investors are handled this way if the name remains generally borrowable. Forced buy-ins are more common on threshold securities and names with very high short interest relative to actual lending supply. ## How This Connects to Clearing, Settlement & Brokerage Mechanics Securities lending sits at the intersection of two settlement processes: the **clearing and settlement of the original short sale** (handled by NSCC/DTC, which settle the trade so that the short seller's broker delivers shares to the buyer by T+1, the cycle in effect since May 28, 2024) and the **ongoing loan management** between the borrower and lender (a bilateral agreement outside the central clearing system but enforced by broker agreements and Regulation SHO). When a recall fails and a buy-in is triggered, the resolution involves the central clearing infrastructure. DTCC tracks fails to deliver at the participant level, and Rule 204 close-out obligations apply to clearing agency participants. This makes securities lending failures a settlement event, not merely a bilateral contract dispute. For context on adjacent mechanics: - [Fails to Deliver and Settlement Failure Mechanics](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/fails-to-deliver-and-settlement-failure-mechanics/): covers FTD mechanics in detail, including the threshold securities list and SHO Rule 203. - [Corporate Actions During the Settlement Cycle](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/corporate-actions-during-the-settlement-cycle/): one of the most common reasons a lender recalls shares is to ensure beneficial ownership for a record date. This page explains how corporate actions interact with settlement. - [How Margin Calls and Forced Liquidation Work](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/how-margin-calls-and-forced-liquidation-work/): buy-ins are a form of forced liquidation. Understanding how brokers execute forced closes in margin accounts clarifies the mechanics of buy-in execution. - [Clearing, Settlement & Brokerage Mechanics hub](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/): the full subcategory map. ## Checklist: Before and During a Short Position 1. **Obtain and record the locate and current borrow rate** before placing the order. Note the date, time, and rate; do not rely on memory. 2. **Compute the break-even borrow cost** for your holding period assumption. If the annualized borrow rate, divided by 365 and multiplied by your planned hold days, exceeds a material fraction of your expected price move, reconsider position size or hold period. 3. **Check the threshold securities list** for your target. Presence on the list signals elevated recall and buy-in risk. 4. **Review short interest relative to float** from the most recent FINRA bimonthly report. Note the trend, rising short interest while float is restricted can accelerate borrow scarcity. 5. **Read your broker's recall policy** in the customer agreement. Know how much notice you will receive and whether replacement borrows are typically arranged automatically. 6. **Identify your pre-planned response to a recall:** Will you cover immediately, or will you attempt to find replacement borrow? Under what conditions will you close without a replacement being available? 7. **Monitor borrow rates daily** on HTB positions. A sudden rate change is an early signal that supply is deteriorating and a recall may follow. 8. **Track cash collateral and margin requirements** as the position moves against you. A rising stock price increases the collateral required on the borrow, which can interact with margin calls on your account. 9. **Set a maximum acceptable borrow cost** per year (e.g., "I will not maintain this position if borrow exceeds 50% annualized") and stick to it, regardless of conviction in the thesis. 10. **Understand the tax treatment** if you are a long investor in a margin account: check your year-end 1099 for payments in lieu of dividends and consult a tax professional if the amounts are material. ## Treating Borrow Terms as a Position Input Borrow availability and cost belong in the decision to open a short position rather than in the review afterwards. A hard-to-borrow name changes the arithmetic of the trade before any price movement happens, because the fee accrues daily and the recall risk sits outside the borrower's control. Checking the rate and the availability at entry, and again periodically, converts a hidden variable into a known one. ![stock exchange trading floor Securities Lending Borrow treating terms](https://www.getswoopr.com/images/accent/markets-execution-clearing-settlement-and-brokerage-mechanics-securities-lending-borrow-recalls-and-buy-ins-accent-3.webp) *Photo by [mwewering](https://pixabay.com/users/mwewering-185784/) via [Pixabay](https://pixabay.com/photos/gold-bars-bullion-feingold-wealth-2800315/)* The misreading here is directional. A high borrow fee is regularly presented as confirmation that a short thesis is right, on the reasoning that everyone wants the position. It is equally consistent with a crowded trade, a small lendable supply, or scarcity created by index and custody arrangements, and the fee contains nothing that separates those explanations. Recalls are the part that resists planning. A lender can ask for shares back for reasons unconnected to the security's outlook, including a routine sale of the underlying holding, and the borrower's options at that point narrow to finding another locate or closing. Lending mechanics describe the plumbing, not the exposure. A comfortable borrow rate places no limit on the loss a short position can generate, and those two questions deserve to be answered separately. ## Frequently Asked Questions ### Can my broker lend out my shares without telling me? If your shares are held in a margin account, your broker's customer agreement almost certainly grants them the right to lend your shares to short sellers. This is standard practice and does not require your individual consent for each loan, because you provided blanket consent when you signed the margin agreement. If you hold shares in a cash account, your broker needs a separate written agreement with you before it can borrow your fully paid shares, as SEC Rule 15c3-3 and FINRA Rule 4330 require. Some brokers offer opt-in share-lending programs for cash accounts that pay a portion of borrow fees; review the terms carefully, including the tax treatment of income received. ### What is the difference between a borrow rate and a margin rate? A borrow rate is the cost a short seller pays to borrow shares, it compensates the lender for temporarily parting with their position. A margin rate (or margin interest rate) is the interest charged by a broker on the cash the broker lends to a customer to purchase securities on margin. They are related but distinct: a short seller may pay both a margin rate on cash used to maintain their account and a borrow rate on the shares they are short. On hard-to-borrow names, the borrow rate typically dominates total carrying cost. ### How much notice does a short seller receive before a buy-in? Under SEC Rule 204, the clearing agency participant must close out the fail by the beginning of regular trading hours on the settlement day following the settlement date, which is the deadline itself, with a longer period only for fails from long sales and bona fide market making. In practice, the short seller may receive a notification from their broker the day before the buy-in deadline, or they may learn of it only after it has been executed. Brokers are not required to give the short seller advance notice of a buy-in in the way they notify them of a margin call; the clearing obligation is the broker's responsibility to the clearinghouse, not a courtesy to the customer. Consult your broker's agreement for their specific practices. ### Does a high fail-to-deliver count mean illegal naked short selling is occurring? Not necessarily. Fails to deliver arise from multiple legitimate sources: settlement timing mismatches, market-maker hedging activities, operational errors, and genuinely difficult borrow conditions on restricted-float securities. SEC Regulation SHO's locate requirement significantly limits the ability to short without a borrow, but fails can still accumulate through legal means. High FTD counts on a given security are a data point worth noting, but they are not themselves proof of illegal activity. Regulatory enforcement actions, not FTD counts alone, establish whether violations occurred. ### Can a recall cause a short squeeze by itself? Recalls contribute to short squeezes but are rarely the sole cause. A recall forces some short sellers to cover (or find replacement borrow), which creates incremental buying pressure. If borrow supply is so scarce that many short sellers receive recalls simultaneously and cannot find replacement lenders, the combined forced buying can accelerate a squeeze. However, the more common squeeze dynamic is a combination of rapidly rising price (triggering margin calls and voluntary stop-losses), limited new supply entering the borrow market, and speculative buying from non-short participants. A single recall affecting one lender's position rarely triggers a market-wide squeeze on its own. ### What happens to dividends paid while shares are on loan? When a company pays a dividend while its shares are out on loan to a short seller, the actual dividend goes to the short seller (who now holds the shares), not to the original shareholder who lent them. The original shareholder receives a **payment in lieu of dividend** from the short seller (via the broker), which is economically equivalent in cash terms. However, the tax treatment differs: qualified dividends from U.S. corporations are taxed at preferential rates (0%, 15%, or 20% depending on income level), while payments in lieu are typically taxed as ordinary income. For taxable accounts with large dividend-paying positions, the difference can be meaningful. IRS Publication 550 addresses this treatment. ### What is a threshold securities list, and why does it matter? A threshold security is an equity security with an aggregate fail to deliver position at a registered clearing agency of 10,000 shares or more that equals at least 0.5% of the issuer's total shares outstanding for five consecutive settlement days and that is included on a list disseminated by a self-regulatory organization (per SEC Regulation SHO Rule 203). Self-regulatory organizations publish these lists daily. Appearing on the threshold list brings the close-out requirement of Rule 203(b)(3) into play: a participant of a registered clearing agency with a fail to deliver position in a threshold security for thirteen consecutive settlement days must then close it out by purchasing securities of like kind and quantity. Traders monitoring threshold securities lists use them as a proxy for borrow scarcity and potential forced-covering pressure, though the relationship between the list and near-term price action is not mechanical. ### Is the borrow rate fixed for the life of a short position? No. Borrow rates on securities loans are typically reset daily by the lending broker based on prevailing supply and demand in the securities lending market. A rate that was 5% annualized when a position was opened can increase to 50% or more if borrow supply tightens, for example, because additional short sellers are competing for the same limited pool of lendable shares, or because the existing lenders recall their shares and the replacement supply is smaller. Some prime brokers offer term borrows (locked-in rates for a defined period) for institutional clients, but these are not available to most retail customers, and they typically cost more than the prevailing spot rate at the time of the agreement. ### How do fully paid lending programmes work for a retail account? Some brokers offer arrangements under which a customer consents to lending their fully paid securities in exchange for a share of the lending revenue, with collateral held on their behalf. Participation is opt-in and separate from the general lending permission attached to margin accounts. Terms including the revenue split, the collateral arrangement and the effect on dividends and voting differ by firm and are set out in the programme agreement. ## References - [SEC: Regulation SHO (Release No. 34-50103, July 2004, as amended)](https://www.sec.gov/rules-regulations/2004/07/short-sales) - [SEC: Key Points About Regulation SHO](https://www.sec.gov/investor/pubs/regsho.htm) - [FINRA: Regulation SHO Resource Center](https://www.finra.org/rules-guidance/key-topics/regulation-sho) - [FINRA: Short Selling (investor education)](https://www.finra.org/investors/learn-to-invest/advanced-investing/short-selling) - [DTCC: Securities Financing Transaction (SFT) Clearing](https://www.dtcc.com/products-and-services/clearing-settlement-services/equities-clearing/securities-financing-transaction) - [IRS: Publication 550, Investment Income and Expenses](https://www.irs.gov/publications/p550) - [FINRA: Short Interest Data](https://www.finra.org/investors/charts-data/short-interest) **Note on changeable facts:** Regulation SHO rule text, threshold securities thresholds, and close-out deadlines are subject to SEC rulemaking. Verify current requirements at SEC.gov or with FINRA before relying on any specific rule citation. Short interest data lags by approximately two weeks from the reporting date. Borrow rates change daily and are proprietary to individual brokers; the rates used in the worked example are hypothetical. ### Next lesson The natural next step after understanding borrow mechanics is understanding what happens when a forced close-out occurs at the broker level: [How Margin Calls and Forced Liquidation Work](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/how-margin-calls-and-forced-liquidation-work/). For the preceding concept in this subcategory, see [Corporate Actions During the Settlement Cycle](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/corporate-actions-during-the-settlement-cycle/). For a broader view of the short-selling ecosystem, including strategy considerations: [Short Selling Overview](https://www.getswoopr.com/learn/short-selling/). For how borrow mechanics interact with options strategies: [Options](https://www.getswoopr.com/options-trading/). ## Educational Disclaimer For education only; not personalized investment, tax, or legal advice. Trading and short selling involve substantial risk, including the risk of losses that exceed the initial amount invested. Broker rules, Regulation SHO requirements, borrow rates, short interest data, threshold securities lists, and tax treatment can change. Verify current requirements with the relevant broker, FINRA, the SEC, or a qualified professional before acting. Examples in this article are hypothetical and illustrative only. ## Articles in This Family - What FTDs are, how they accumulate, and how Regulation SHO closes them out. Guide 25 min read - How dividends, splits, and rights offerings interact with open short positions. Guide 25 min read - The mechanics of forced closes and how buy-ins fit into broker liquidation events. Guide 20 min read - How account type determines whether your shares can be lent. Guide 20 min read ## Parent Hubs - [Clearing, Settlement & Brokerage Mechanics](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/) Hub 10 min read - [Market Structure & Trade Execution](https://www.getswoopr.com/markets/execution/) Hub 15 min read ## Related Topics - [Short Selling Overview](https://www.getswoopr.com/learn/short-selling/) 30 min read - [Stock Trading Strategies](https://www.getswoopr.com/stocks/trading-strategies/) 30 min read - [Options](https://www.getswoopr.com/options-trading/) 5 min read - [Futures & Perpetuals](https://www.getswoopr.com/crypto/derivatives/) 10 min read ## Tools - [Execution Cost Calculator](https://www.getswoopr.com/tools/execution-cost-calculator/) Tool 5 min read - [Trading Journal](https://www.getswoopr.com/tools/trading-journal/) Tool 5 min read ## Related Reading - [Clearing, Settlement & Brokerage Mechanics](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/) the section this guide belongs to - [Beneficial Ownership, Custody, and Street Name](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/beneficial-ownership-custody-and-street-name/) a companion guide in this cluster - [Brokerage Mechanics Checklist](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/brokerage-mechanics-checklist/) a companion guide in this cluster - [Cash Account Violation Simulator](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/cash-account-violation-simulator/) a companion guide in this cluster - [Cash Accounts vs. Margin Accounts: Settlement Mechanics](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/cash-accounts-vs-margin-accounts-settlement-mechanics/) a companion guide in this cluster - [Clearing vs. Settlement: What Happens After a Fill](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/clearing-vs-settlement-what-happens-after-a-fill/) a companion guide in this cluster - [Short Interest and Days-to-Cover](https://www.getswoopr.com/market-sentiment/short-interest-and-days-to-cover/) shares this topic - [Common Brokerage and Settlement Mistakes](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/common-brokerage-and-settlement-mistakes/) a companion guide in this cluster - [Corporate Actions During the Settlement Cycle](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/corporate-actions-during-the-settlement-cycle/) a companion guide in this cluster - [Fails to Deliver and Settlement Failure Mechanics](https://www.getswoopr.com/markets/execution/clearing-settlement-and-brokerage-mechanics/fails-to-deliver-and-settlement-failure-mechanics/) a companion guide in this cluster