Definition
Regulation SHO is a U.S. Securities and Exchange Commission regulation that addresses short-sale practices in equity markets. It includes requirements connected to locating shares, closing out certain delivery failures, and short-sale price restrictions under specified conditions.
Mechanics
For ordinary investors, the broker handles many operational details. Still, understanding the framework matters because it explains why short selling is not simply "press sell." Borrow availability, locate procedures, settlement, and failures to deliver all affect how short sales operate.
Worked example
If an investor wants to sell a stock short, the broker must follow applicable locate rules before accepting or executing the order. If shares cannot reasonably be borrowed or delivered as required, the short sale may not be available in the ordinary way.
Key concepts
| Concept | Plain-English meaning |
|---|---|
| Locate | Reasonable basis that shares can be borrowed and delivered. |
| Close-out | Rules addressing certain failures to deliver securities. |
| Threshold security | A security with significant persistent delivery failures under specified criteria. |
| Price test restriction | A short-sale restriction triggered by specified sharp price declines. |
Common mistakes
- Assuming all short selling is abusive.
- Assuming rules eliminate short-selling risk.
- Confusing legal short selling with manipulative activity.
- Ignoring that brokers may impose stricter practical limits than the rule minimum.
Stock Shorter framing
Compliance is part of research quality. Stock Shorter does not publish trading instructions or brokerage execution guidance. The site explains short-side mechanics so readers can understand risk, evidence, and structure while relying on qualified professionals for individual circumstances.
Educational research only. This page is not legal advice.