When was the last time the stock markets trades were frozen?

The last significant Stock Market trading freeze occurred on March 9, 2020, when the S&P 500 Index fell by more than 7%, triggering a market-wide circuit breaker. This halt lasted for 15 minutes to allow investors to assess the situation amid growing concerns over the COVID-19 pandemic. Circuit breakers are mechanisms designed to prevent panic selling and stabilize the markets during extreme volatility.