After-hours trading refers to trading that occurs on major exchanges outside the regular trading hours of 9:30 a.m. and 4 p.m. ET in the U.S. After-hours trading starts at 4 p.m. and ends at 8 p.m.; pre-market trading occurs between 8 a.m. and 9:30 a.m. each trading day. Extended hours quotes reflect the best bid and ask orders currently available. Nasdaq.com reports pre-market and after-hours trades.
