Types of Stock Trading Halts Explained
Stock trading halts are temporary pauses in trading that help support orderly markets and investor protection during unusual market conditions. While all trading halts temporarily stop buying and selling of a security, the reason behind each halt can be very different.
Understanding the different types of stock trading halts helps investors know what to expect, whether they own US stocks, ETFs, or other exchange-listed securities through Raseed.
The most common types of trading halts include:
Volatility Halt (LULD Halt)
A volatility halt, also known as a Limit Up-Limit Down (LULD) halt, occurs when a stock's price moves too far above or below its permitted trading range within a short period.
This mechanism is designed to prevent excessive price swings caused by panic selling, speculative buying, or sudden market reactions. During the pause, investors have time to assess new information before trading resumes.
Volatility halts typically last around five minutes, although the duration may vary depending on market conditions and exchange rules.
News Pending Halt
An exchange may temporarily halt trading when important company information is about to be released.
Examples include:
- •Quarterly earnings announcements
- •Major acquisitions or mergers
- •Bankruptcy filings
- •Regulatory investigations
- •Significant management changes
- •Material corporate announcements
Pausing trading helps ensure that all investors receive important information at the same time, supporting a fair and transparent market.
News Dissemination Halt
After important company news has been released, exchanges may keep trading paused briefly to allow investors sufficient time to review the information before trading resumes.
This helps reduce sudden price movements caused by investors reacting before the market has fully absorbed the announcement.
Market-Wide Trading Halt (Circuit Breaker)
Unlike other halts that affect a single stock, a market-wide trading halt temporarily pauses trading broadly across U.S. equity markets when major market indices experience sharp declines.
These circuit breakers are designed to reduce panic selling and allow investors time to evaluate market conditions before trading resumes.
For example, US exchanges may activate market-wide circuit breakers if the S&P 500 falls by predetermined percentages during a single trading session.
Regulatory Trading Halt
Regulators or exchanges may halt trading if there are concerns regarding:
- •Unusual trading activity
- •Possible market manipulation
- •Compliance investigations
- •Missing financial disclosures
- •Questions regarding listing requirements
These halts remain in place until the exchange determines that trading can resume fairly.
Operational or Technical Halt
Occasionally, trading may stop because of technical issues affecting an exchange or market infrastructure.
Examples include:
- •Exchange system outages
- •Connectivity problems
- •Order routing failures
- •Market data interruptions
These halts are generally resolved once the technical issue has been fixed.
While investors usually don't need to memorize trading halt codes, you may occasionally see these codes displayed on trading platforms, exchange announcements, or market data services. The table below summarizes common U.S. trading halt codes based on official exchange and regulatory sources. Exact handling, duration, and order treatment may vary by exchange, security, and market conditions.
| Code | Name | Trigger / Meaning | Typical Duration | Can Trade? |
|---|---|---|---|---|
| LUDP | Volatility Trading Pause | Price moves outside the Limit Up-Limit Down permitted range | Usually short; may vary by exchange rules | No |
| LUDS | Volatility Trading Pause — Straddle Condition | Quotes are near or at the LULD price band, creating a straddle condition | Variable | No while the pause is in effect |
| T1 | News Pending | Trading is halted pending the release of material company news | Variable | No |
| T2 | News Released | Material news has begun dissemination through Regulation FD-compliant channels | Brief / variable | No |
| T3 | News and Resumption Times | News has been fully disseminated and quote/trade resumption times have been announced | Until the announced quote/trade resumption times | No until trading resumes |
| T5 | Single Stock Trading Pause | Trading is paused due to a significant short-term price move in a single security | Usually short; may vary by exchange rules | No |
| T6 | Extraordinary Market Activity | Trading is halted due to unusual or extraordinary market activity that may materially affect trading in the security | Variable | No |
| T12 | Additional Information Requested | The exchange has requested additional information from the company before trading can resume | Until the requested information is provided and reviewed | No |
| H4 | Non-Compliance | Trading is halted because the company is not compliant with Nasdaq listing requirements | Variable | No |
| H9 | Not Current | Trading is halted because the company is not current in its required filings | Variable | No |
| H10 | SEC Trading Suspension | The SEC has suspended trading in the security | Up to 10 trading days | No |
| H11 | Regulatory Concern | Trading is halted for regulatory reasons in coordination with another exchange or market | Variable | No |
| O1 | Operations Halt | Trading is halted due to an operational issue; market operations should be contacted | Until the operational issue is resolved | No |
| MWC1 | Market-Wide Circuit Breaker — Level 1 | S&P 500 declines by 7% from the previous trading day’s close | 15 minutes, if triggered before 3:25 p.m. ET | No |
| MWC2 | Market-Wide Circuit Breaker — Level 2 | S&P 500 declines by 13% from the previous trading day’s close | 15 minutes, if triggered before 3:25 p.m. ET | No |
Note: Trading halt codes may vary between exchanges and market data providers. The descriptions above cover the most common halt codes that investors may encounter in U.S. markets.
What Should Investors Do During Any Trading Halt?
Although you cannot execute trades while a security is halted, you can still:
- •Review company announcements.
- •Monitor official exchange updates.
- •Reassess your investment strategy.
- •Modify or cancel eligible pending orders during the halt, where exchange rules and broker procedures permit.
- •Avoid making emotional investment decisions based solely on temporary price movements.
Many trading halts are precautionary measures and do not necessarily indicate that a company is experiencing financial problems.
Invest with Confidence Using Raseed
Ready to invest with confidence? Sign up for Raseed today to access US stocks, ETFs, fractional shares, and professional investing tools—all from one easy-to-use platform built for investors across Saudi Arabia and the GCC.