The US stock market, including the New York Stock Exchange (NYSE) and Nasdaq, typically opens at 9:30 a.m. Eastern Time and closes at 4:00 p.m. Eastern Time, Monday through Friday. It is closed on weekends. On some holidays or special occasions, there may be early closures (e.g., closing at 1:00 p.m. ET on certain days). Outside these hours, extended trading sessions are available but occur through electronic communication networks and have different time frames from the regular market hours.