Halt
Definition
A temporary suspension of trading in a specific stock, ordered by an exchange or regulator. Halts pause all buying and selling activity and are triggered by extreme volatility, a pending material news announcement, a regulatory issue, or a market-wide circuit breaker.
Example
“"I was long going into the halt — fifteen minutes of sitting there with no idea where it was going to reopen. It came back up 20%, but that's not a feeling you want to make a habit of."”
Detailed Explanation
Halts are one of the most unnerving events a day trader can experience because they eliminate your most basic tool: the ability to exit. When a stock is halted, all orders — including stop-losses — are suspended. You hold your position, however large, with no ability to manage it until trading resumes. The stock may reopen higher, lower, or not at all that session. Your stop-loss means nothing until the market reopens.
There are several types of halts. A news pending halt (T1) is the most common — the exchange halts the stock while a company releases material information, typically earnings results, merger announcements, FDA decisions, or major business updates. Trading resumes once the news is disseminated and the exchange determines the market has had time to absorb it. A volatility halt occurs when a stock moves too far too fast within a short window, triggering a brief pause (usually 5 minutes) to let the market reset — these are common in momentum stocks during fast intraday moves.
At the market level, circuit breakers can halt the entire market. A 7% decline in the S&P 500 triggers a 15-minute market-wide halt; a 13% decline triggers another 15-minute halt; a 20% decline halts trading for the remainder of the session. These were introduced after the 1987 crash and the 2010 Flash Crash to prevent panic selling from cascading into market collapse.
Managing halt risk in day trading means respecting position size. If a stock is known for news-driven halts — biotech, small-cap momentum, anything with a binary catalyst pending — your position should be sized so that a worst-case reopening doesn't destroy your account. Professional traders who hold through halts on purpose are making a calculated bet with defined size; those who get caught large in an unexpected halt are usually trading beyond their risk parameters. The rule is simple: size for the possibility that you can't get out.