Table of Contents
SERIES 7 PREP | FINANCIAL REGULATION COURSES
A short sale is the sale of a security that the seller does not own, or any sale that is consummated by the delivery of a security borrowed by or for the account of the seller — the foundational statutory definition established in Regulation SHO Rule 200 under the Securities Exchange Act of 1934, which consolidated and replaced the prior definition in former Exchange Act Rule 3b-3. Every short sale involves two distinct elements that define it — the seller's lack of ownership of the securities at the time of sale, and the obligation to borrow securities to make delivery to the buyer on settlement date. The short sale is the transaction that establishes a short position, and understanding its regulatory definition, its marking requirements, its economic function, its historical regulatory evolution, and the specific rules governing when and how short sales may be executed is foundational knowledge for every securities professional and is among the most heavily tested topics on the Series 7 examination.
Regulation SHO Rule 200 — adopted by the SEC effective January 3, 2005 as part of the comprehensive Regulation SHO framework codified at 17 CFR Part 242 — defines a short sale and establishes the ownership determination that governs whether a sale order must be marked long or short. Understanding how Rule 200 defines ownership is essential for correctly marking orders and for understanding when the locate requirement of Rule 203 applies.
Under Rule 200(b), a person is deemed to own a security only to the extent that they have a net long position in the security — meaning they have purchased more shares than they have sold short in that security, creating a positive net balance. A seller who has purchased one thousand shares and sold five hundred short in a different transaction has a net long position of five hundred shares and is deemed to own five hundred shares for purposes of Rule 200's ownership determination.
Under Rule 200(g), a sale order may be marked long only if the seller is deemed to own the security being sold — having a net long position — and either the security is in the physical possession or control of the broker-dealer or it is reasonably expected that the security will be in the possession or control of the broker-dealer no later than the settlement of the transaction. If either condition is not met — the seller does not have a net long position, or the securities cannot be delivered by settlement — the sale must be marked short.
This marking requirement is the operational foundation of the short sale regulatory framework — accurate marking enables FINRA and the SEC to monitor short selling activity, identify potential manipulation or abusive naked short selling, and enforce the locate and close-out requirements that depend on whether a sale is long or short.
Regulation SHO Rule 200 requires that every sell order in an equity security be marked as one of three designations — long, short, or short exempt — at the time the order is entered into the broker-dealer's order management system.
A long marking indicates that the seller owns the security and that it will be delivered from the seller's own holdings by the settlement date. Long-marked orders are not subject to the locate requirement or the alternative uptick rule restriction.
A short marking indicates that the seller does not own the security or cannot deliver from owned shares by settlement — the sale must be consummated through borrowed shares. Short-marked orders are subject to the locate requirement of Rule 203(b)(1) — the broker-dealer must have borrowed the security, entered a bona fide arrangement to borrow it, or have reasonable grounds to believe it can be borrowed for delivery before accepting or executing the short sale order.
A short exempt marking indicates that the sale qualifies for an exemption from the alternative uptick rule price restriction of Rule 201 — which restricts short sales in securities that have declined ten percent or more from the prior day's closing price. A short exempt marking allows the order to execute even if it would otherwise be restricted by Rule 201's circuit breaker, provided the order qualifies for one of the enumerated exemptions under that rule — including exemptions for bona fide market making, risk-arbitrage in connection with mergers and acquisitions, and certain other specified circumstances.
The short sale has been subject to federal regulation since the Securities Exchange Act of 1934 — Section 10(a) of the Exchange Act grants the SEC authority to regulate short sales by prescribing rules and regulations to define and prevent short sales that are manipulative or deceptive or that might operate as a device for fraud or deceit.
Under this authority, the SEC adopted Rule 10a-1 in 1938 — the original uptick rule — which prohibited the execution of short sales on a national securities exchange at a price below the last reported sale price — called a minus tick — or at the same price as the last reported sale if the last change in price was downward — called a zero minus tick. The uptick rule required that short sales be executed only at a price equal to or above the last reported sale price — the plus tick condition — or at the same price as the last reported sale when the immediately preceding price change was upward — the zero plus tick condition.
The uptick rule served for sixty-nine years as the primary price-based restriction on short selling — the SEC's mechanism for preventing short sellers from accelerating a declining market by pile-driving prices lower through rapid successive short sales at each new low. It applied only to exchange-listed securities transacted on exchanges — not to OTC-traded securities — creating an asymmetric regulatory framework as the OTC market grew.
The SEC eliminated Rule 10a-1 in 2007 following a pilot programme — Regulation SHO Rule 202T — that tested the removal of price tests from a randomly selected subset of securities. The pilot programme's evidence suggested that price tests did not meaningfully reduce short selling pressure or volatility in the pilot securities, and the SEC concluded that the uptick rule was unnecessary in a modern electronic market where prices adjusted instantly and the uptick rule's friction could actually impair legitimate short selling that serves price discovery functions.
The 2008 financial crisis — during which dramatic declines in financial sector stocks generated intense political and regulatory pressure to restrict short selling — demonstrated that the removal of the uptick rule had occurred at exactly the wrong moment from a political perspective. The SEC responded first with emergency orders in 2008 temporarily banning short sales in financial sector stocks — an emergency restriction that most academic research subsequently concluded had limited effectiveness in stabilising prices and may have impaired market quality — and then with the adoption of the alternative uptick rule in 2010.
Regulation SHO Rule 201 — adopted February 26, 2010 and effective May 10, 2010 — is the circuit-breaker-based price restriction that replaced the abolished uptick rule. Unlike the original uptick rule — which applied to every short sale on a tick-by-tick basis — Rule 201 applies only when a security's price has declined by ten percent or more from the prior day's closing price during the current trading session.
When the ten percent decline circuit breaker is triggered for a specific security, the SEC requires that for the remainder of that trading day and the following full trading day, short sales in that security may only be executed at a price above the current national best bid. This restriction prevents short sellers from hitting the bid — selling at the prevailing bid price — during a period of severe price decline, requiring them instead to place orders above the current best bid to sell short. The restriction is intended to give long sellers priority to exit the market ahead of short sellers during periods of severe stress, preventing short selling from accelerating a panic-driven decline.
The ten percent trigger is calculated from the prior day's official closing price as reported in the consolidated tape. A security whose official close was fifty dollars experiences a Rule 201 trigger at forty-five dollars — when the intraday price first touches a ten percent decline from the prior close. Once triggered, the restriction applies automatically for the remainder of that trading session and all of the following trading session — the restriction does not reset intraday if the stock recovers above the ten percent threshold after the trigger has been pulled.
The alternative uptick rule applies to all NMS stocks — all equity securities traded on national securities exchanges — but does not apply to options, futures, or other derivatives whose prices move in response to the underlying equity's price movement. It contains specific exemptions for transactions where the short exempt marking applies — including bona fide market making activities where market makers must continue to sell short to provide liquidity even during price declines.
A covered short sale is one in which the seller has satisfied the locate requirement — the seller has borrowed the securities, entered a bona fide arrangement to borrow, or has reasonable grounds to believe they can borrow for delivery on the settlement date. Covered short sales are the standard form of legitimate short selling — they satisfy Regulation SHO's locate requirement and therefore qualify for the safe harbour from manipulation concerns that compliance with Regulation SHO provides.
A naked short sale is a short sale executed without satisfying the locate requirement — the seller sells shares they have not borrowed and have no arrangement to borrow, creating an obligation to deliver securities on settlement date that they cannot fulfill. Naked short selling produces fail-to-deliver positions at the NSCC clearing level — the sold shares are not delivered to the buyer on settlement date because the seller never arranged for borrowable supply.
Naked short selling is prohibited by Regulation SHO Rule 203(b)(1)'s locate requirement — any short sale executed without a prior locate is a violation. The SEC has acknowledged that some forms of apparent naked short selling arise from legitimate operational failures — securities that were located but became unavailable between the locate and the settlement date — and that these unintentional fails are treated differently from intentional naked short selling that is designed to manipulate prices through the creation of phantom supply. The Regulation SHO close-out requirements of Rule 204 address both categories by requiring prompt resolution of fail-to-deliver positions regardless of their cause.
Short selling conducted in connection with a public securities offering is subject to additional restrictions beyond the general Regulation SHO framework — specifically Regulation M Rule 105, which prohibits purchasing securities in a public offering from an underwriter or broker-dealer participating in the offering if the purchaser sold short the same security during the restricted period that begins five business days before the pricing of the offering and ends with the pricing.
The Rule 105 restriction is designed to prevent a specific form of manipulation in which an investor sells a security short before a discounted public offering — establishing a short position at prevailing market prices — and then covers that short position by purchasing the newly issued shares at the discounted offering price, profiting from the spread between the market price and the offering price at the expense of the issuer and the other offering participants. Violations of Rule 105 have been a consistent enforcement priority for the SEC's Division of Enforcement — the SEC has brought numerous Rule 105 enforcement actions resulting in disgorgement of profits and civil penalties against hedge funds and other sophisticated investors who engaged in this prohibited pattern.
Every covered short sale requires a borrowing arrangement — short sellers obtain the securities they sell short through the securities lending market, as discussed in the Securities Lending entry of this dictionary. The cost of the borrowing arrangement — expressed as a lending fee for non-cash collateralised loans or as a reduction in the rebate paid on cash collateral — is an ongoing cost that the short seller incurs throughout the life of the short position and that directly reduces the net profit from a successful short trade.
For general collateral securities — widely available, actively borrowed equity securities — borrowing costs are minimal and represent a small friction cost relative to the potential profit from the short trade. For special collateral securities — securities in high demand for borrowing because of elevated short interest — borrowing costs can be substantial, sometimes reaching double-digit annualised rates that make the economics of holding a short position challenging even when the fundamental bearish thesis is correct. The availability and cost of borrowing is therefore a practical constraint on short selling that the theoretical framework of Regulation SHO's locate requirement reflects — a locate that becomes unavailable before settlement creates a fail-to-deliver that Rule 204 requires the clearing participant to close out.
The short sale serves three distinct economic functions in well-functioning securities markets — functions that are important to understand both for examination purposes and for the investment analysis and communication obligations of registered representatives.
Price discovery is the most fundamental economic function of short selling — short sellers who identify overvalued securities and sell them short incorporate their negative information into market prices more rapidly than would occur if only long investors could act on their information. A market without short selling would systematically overvalue securities because pessimistic investors could only avoid owning overvalued stocks rather than actively selling them — they could not express their negative view with the same force as optimistic investors who can purchase. The Securities Exchange Act's grant of authority in Section 10(a) to regulate rather than prohibit short selling reflects Congress's recognition that short selling serves legitimate price discovery functions that benefit market efficiency.
Market making and liquidity provision require short selling as an operational necessity — a market maker who receives a customer buy order in a security where they have no long inventory must sell short to fill the order and then work to acquire the security in the market to cover the resulting short position. Without the ability to short, market makers could only fill customer buy orders by first purchasing the security — an impossible requirement in a fast-moving market where the customer's order must be filled immediately. The bona fide market making exception from Regulation SHO's locate requirement reflects this operational reality.
Hedging allows investors to manage risk by establishing short positions that offset the risk of long positions in related securities — a long position in a portfolio of bank stocks can be partially hedged with short positions in the financial sector index, a long convertible bond position can be delta-hedged with short equity positions, and arbitrage positions in merger targets can be hedged with short positions in the acquirer. These hedging and arbitrage applications of short selling contribute to market efficiency by keeping related securities priced in appropriate relationships to each other.
The short sale is tested on the Series 7 examination in the context of the Regulation SHO regulatory framework, the marking requirements, the locate requirement, the alternative uptick rule, naked short selling, and the economic functions of short selling in securities markets.
The key points to retain are these.
A short sale is the sale of a security the seller does not own, or any sale consummated by delivery of borrowed securities — the statutory definition under Regulation SHO Rule 200, which replaced former Exchange Act Rule 3b-3 effective January 3, 2005. Regulation SHO — codified at 17 CFR Part 242, Rules 200 through 204 — is the comprehensive short sale regulatory framework enacted under Securities Exchange Act Section 10(a)'s authority to regulate manipulative or deceptive short selling practices.
Rule 200 requires every equity sell order to be marked long, short, or short exempt at the time of order entry. Long marking requires that the seller has a net long position and that the security will be delivered by settlement. Short marking triggers the locate requirement. Short exempt marking indicates the order qualifies for an exemption from the Rule 201 alternative uptick rule price restriction. Rule 201 — the alternative uptick rule adopted February 26, 2010 — restricts short sales in a security whose price has declined ten percent or more from the prior day's closing price during the current session, requiring that all short sales for the remainder of that session and the following full session execute only at prices above the current national best bid.
Rule 203(b)(1) — the locate requirement — prohibits broker-dealers from accepting or effecting short sale orders unless the security has been borrowed, a bona fide arrangement to borrow has been entered, or reasonable grounds exist to believe it can be borrowed for delivery on the settlement date — documented in writing before execution. The bona fide market making exception under Rule 203(b)(2) exempts genuine market making activities from the locate requirement. Covered short sales satisfy the locate requirement. Naked short sales are executed without any borrowing arrangement and produce fail-to-deliver positions that Rule 204 requires to be closed out by the beginning of regular trading hours on the settlement day following the settlement date. Regulation M Rule 105 prohibits purchasing shares in a public offering from a participating underwriter if the purchaser sold the same security short during the five-business-day restricted period before the offering pricing. The three economic functions of short selling are price discovery, market making and liquidity provision, and hedging and arbitrage — all of which contribute to market efficiency and are recognised by the legislative framework of Securities Exchange Act Section 10(a) which grants authority to regulate rather than prohibit short selling.
