The American stock market, including the New York Stock Exchange (NYSE) and NASDAQ, opens at 9:30 AM Eastern Time (ET) on all working days, Monday through Friday. The market closes at 4:00 PM ET on these days. Trading does not happen on Saturdays and Sundays. There are also pre-market trading hours from 4:00 AM to 9:30 AM ET and after-hours trading from 4:00 PM to 8:00 PM ET, but the official normal trading session is 9:30 AM to 4:00 PM ET.