In the United States, the regular trading hours for the stock market are from 9:30 AM to 4:00 PM Eastern Time, Monday through Friday. After 4:00 PM, the stock market is officially closed. However, there are extended trading hours known as “after-hours trading” and “pre-market trading” where you can still buy and sell stocks, but it’s typically more limited, and not all stocks are available for trading during these times. It’s essential to check with your brokerage to see if they offer after-hours trading and what their specific hours and rules are for it. Keep in mind that after-hours trading can be riskier due to lower liquidity and potentially more significant price volatility.