After-hours trading refers to the buying and selling of stocks after the close of the U.S. stock exchanges at 4 p.m. through 8 p.m. U.S. Eastern time.

Stock trading is no longer limited to the traditional market hours of 9:30 a.m. to 4:00 p.m. ET, with some brokers now offering 24-hour trading options. Pre-market trading typically runs from 4:00 a.m ...