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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.
The first telephone exchange in the United States opens in New Haven, in 1878, under license from Bell Telephone. Within a few years, licensed telephone exchanges open in every major city in the country. January 14, 1879, Bell demonstrates the telephone for Queen Victoria.he first telephone exchange in the United States opens in New Haven, in 1878, under license from Bell Telephone. Within a few years, licensed telephone exchanges open in every major city in the country. January 14, 1879, Bell demonstrates the telephone for Queen Victoria.