US Stock Market Hours Explained: Regular, Pre-Market and After-Hours Trading

The two major US stock exchanges — the New York Stock Exchange (NYSE) and Nasdaq — share the same core schedule. Knowing it helps you understand why big moves often happen before most investors are awake.

Regular Trading Hours

Regular trading runs from 9:30 a.m. to 4:00 p.m. Eastern Time, Monday through Friday. The opening and closing minutes are usually the busiest of the day, as large institutions place orders and closing prices are set for mutual funds and indexes.

Pre-Market and After-Hours Trading

Many brokers also offer extended-hours trading:

• Pre-market: commonly from about 4:00 a.m. to 9:30 a.m. ET.
• After-hours: commonly from 4:00 p.m. to about 8:00 p.m. ET.

Exact windows vary by broker. Companies often release earnings reports and major news outside regular hours, which is why big price moves frequently happen in these sessions.

Risks of Extended-Hours Trading

• Lower liquidity: fewer buyers and sellers.
• Wider bid-ask spreads: you may pay more to buy or receive less to sell.
• Higher volatility: prices can swing sharply on small volumes.
• Limit orders only: many brokers require them in extended hours.

For most long-term investors, there's little reason to trade outside regular hours.

Market Holidays and Early Closes

US exchanges close on several federal holidays each year, such as New Year's Day, Independence Day, Thanksgiving and Christmas, and sometimes close early around holidays. The official schedule is published on the NYSE holiday calendar.