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Opening Bell Times. The New York Stock Exchange opens at 9:30 a.m. Eastern Time and closes at 4:00 p.m. Eastern Time, but different exchanges open at different times of the day. For example, many futures markets have an opening bell followed by a morning and afternoon session.
DEFINITION of 'Opening Bell'. A bell that is rung to signify the start of the day's trading session. The opening bell is both a symbol of the opening of the market for the day and a physical event involving an individual striking a metal bell. Since 1985, the New York Stock Exchange (NYSE) has used the opening bell to start its trading session at 9:30 a.m.