Most candidates think Regulation SHO is about punishing naked short selling. It’s not. The exam tests your understanding of the three sequential tripwires FINRA uses to prevent delivery failures before they happen. Getting the triggers and timelines for the Locate, Threshold, and Close-Out rules wrong is one of the fastest ways to lose points on exam day.
Regulation SHO requires broker-dealers to have reasonable grounds to locate shares before a short sale (Rule 203). It also establishes stricter close-out rules for "threshold securities" with persistent delivery failures and mandates a mandatory buy-in for unsettled short sales by T+3 for regular stocks or T+5 for threshold securities (Rule 204).
Key facts
- Official Body
- Enacted by the SEC; enforced by FINRA.
- Exam Sections
- Regulation SHO questions appear across market making, trading, and regulatory requirement domains.
- Study Hours
- Candidates typically dedicate 50-80 hours to prepare for the Series 57.
- Passing Score
- A score of 70% is required to pass the Series 57 exam.
- Salary Range
- Securities traders typically earn between $80,000 and $160,000 annually, according to the U.S. Bureau of Labor Statistics (BLS).
- Exam Format
- The 2026 Series 57 exam consists of 50 scored multiple-choice questions over 1 hour and 45 minutes.
What Is Regulation SHO and Why Does It Matter on the Series 57?
Regulation SHO is the SEC's framework to prevent abusive short selling by ensuring firms can deliver the securities they sell. For your Series 57 exam, you must master the precise operational sequence and thresholds that trigger each part of the rule. Focusing only on the "naked shorting" outcome is a mistake; the test is about the preventative process.
The regulation is a three-stage system: the "Locate" rule, the "Threshold Securities" designation, and the "Mandatory Close-Out" rule. Each stage has a specific trigger, timeline, and consequence. Try VoraPrep's free Series 57 practice questions to see how these concepts are tested in realistic scenarios.
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What Is the Locate Requirement (Rule 203(b)(1))?
The Locate Rule requires a broker-dealer to have reasonable grounds to believe a security can be borrowed and delivered by the settlement date before executing a short sale. This is a pre-trade diligence requirement, not a post-trade fix.
How Do Firms Satisfy the Locate Rule?
A firm must document its "locate" for each short sale. This affirmative determination can be satisfied in several ways:
- Physically borrowing the shares.
- Entering into a contract to borrow the shares.
- Having reasonable grounds to believe the shares are available from a specific source. This can include relying on an "Easy to Borrow" (ETB) list, which is a list of securities the firm has deemed readily available for borrowing without a specific inquiry for each trade.
The key is documentation. A firm cannot simply assume shares are available because the stock is liquid.
Bona Fide Market Making Exception
A critical exception to the locate requirement exists for bona fide market makers. When shorting to facilitate customer orders or maintain a fair and orderly market, a market maker is exempt. This exemption is narrow. It does not apply to the firm's proprietary trading desk making a directional bet or to short sales for a customer's account.
How Does a Security Become a "Threshold Security"?
A threshold security is an equity that has shown a persistent pattern of settlement failures, signaling a potential borrowing shortage. This official designation, published daily by FINRA, triggers stricter close-out rules.
For a security to be placed on the threshold list, it must meet all three of the following conditions for five consecutive settlement days:
- Aggregate fail-to-deliver positions at a registered clearing agency are 10,000 shares or more.
- The level of fails is equal to at least 0.5% of the issuer's total shares outstanding.
- The security is an NMS stock.
If these conditions persist for five straight days, the security appears on the threshold list published for the next day.
ZYX Corp. has 2,000,000 shares outstanding. The 0.5% level is 10,000 shares (2,000,000 * 0.005).
- Monday: Fails are 8,000 shares. This is below the 10,000-share minimum. The clock does not start.
- Tuesday: Fails jump to 15,000 shares. This meets both the 10,000-share and 0.5% thresholds. This is Day 1.
- Wednesday: Fails are 12,000 shares. Still meets the criteria. This is Day 2.
- Thursday: Fails are 9,000 shares. The conditions are NOT met. The clock resets to zero.
- Friday: Fails are 20,000 shares. This is Day 1 of a new count.
If the fails remain above 10,000 shares from Friday through the following Thursday (five consecutive settlement days), ZYX would be added to the threshold list.
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What Is the Mandatory Close-Out Rule (Rule 204)?
Rule 204 is the enforcement mechanism of Regulation SHO. It dictates when a broker-dealer must resolve a fail-to-deliver position by buying securities in the open market. The timeline is the most heavily tested part of this rule.
Step 1: A Fail-to-Deliver Occurs (T+2)
A fail-to-deliver happens when a seller doesn't deliver securities to the buyer on the settlement date, which for equities is the trade date plus two business days (T+2).
Step 2: Apply the Correct Close-Out Deadline
The deadline to close out the position depends entirely on whether the security is on the threshold list.
- For a regular (non-threshold) security: The firm must close out the fail-to-deliver position by purchasing shares before the market opens on the day after the settlement date. This is T+3.
- For a threshold security: The firm has an extended period. It must close out the position by purchasing shares before the market opens on the third settlement day following the settlement date. This is T+5.
Step 3: Understand the Penalty for Failure (The "Penalty Box")
If a firm fails to close out the position by the T+3 or T+5 deadline, it enters a "penalty box" under Rule 204. For that specific security, the firm is now prohibited from accepting any more short sale orders unless it has pre-borrowed the shares before executing the trade. This restriction lasts until the fail is cleared. This is a significant operational burden designed to force compliance.
Reg SHO on the Exam: Thinking Like the Examiner
The Series 57 doesn't just ask for definitions. It presents scenarios where you must act as a trader or compliance officer. When you see a Reg SHO question, don't just look for a familiar term. Instead, analyze the facts.
- The Trade: Is it a customer short sale or a bona fide market-making trade? This determines if a locate is needed.
- The Security: Is there any mention of persistent fails or the threshold list? This determines the close-out timing.
- The Dates: Carefully map out T, T+2, T+3, and T+5. The exam will use specific days of the week to trick you.
This structured approach is far more reliable than memorization. Our Series 57 Cheat Sheet with key Reg NMS/SHO rules provides a concise summary of these timelines. VoraPrep's complete course teaches this judgment-first method across all exam topics, with a personalized study plan and our 24/7 tutor, Vory, to guide you.
Comparing Reg SHO Key Components
This table summarizes the critical distinctions for the Series 57 exam.
| Feature | Locate Rule (Rule 203(b)) | Threshold Securities | Close-Out Rule (Rule 204) |
|---|---|---|---|
| Purpose | Ensure share availability before a short sale. | Identify securities with chronic delivery failures. | Force resolution of fail-to-deliver positions. |
| Trigger | Before any short sale execution. | 10k+ fails & 0.5%+ outstanding for 5 straight days. | A fail-to-deliver position at T+2 settlement. |
| Action | Document "reasonable grounds" to believe shares can be borrowed. | Triggers the extended T+5 close-out timeline. | Buy-in to cover the failed position. |
| Timeline | Pre-trade. | Designation after 5 consecutive days of fails. | By market open on T+3 (regular) or T+5 (threshold). |
| Penalty | Violation of FINRA rules. | None directly; it's a status that affects other rules. | Firm enters "penalty box" (pre-borrow required). |
Your success on the Series 57 hinges on applying rules under pressure, not just reciting them. VoraPrep’s adaptive learning engine finds your weak spots in topics like Reg SHO and serves up questions to strengthen them. With over 1,200 practice questions, detailed rationales, and Vory, your 24/7 personal tutor, our complete 6-pillar interactive course is the #1 Best Overall choice for serious candidates.
For a full breakdown of the exam and what to expect, our official VoraPrep Series 57 information page has you covered. You can also explore more exam strategy guides on our blog for expert insights.