A trading halt is a temporary suspension of trading in a specific security or across an entire exchange, ordered by SEBI or the stock exchange, to allow the market to absorb and fairly process material information. Halts may be triggered by pending corporate announcements (such as mergers, earnings, or regulatory orders), extreme price movements activating circuit breakers, or technical glitches. In India, NSE and BSE enforce market-wide circuit breakers that halt trading for 45 minutes to 2 hours when the Nifty 50 or Sensex drops by 10%, 15%, or 20% in a single session. Trading halts protect investors from trading on incomplete or inaccurate information.