NYSE, whose roots stretch back to the 18th century, famously signals the start and end of daily trading with bell-ringing ceremonies in the morning and afternoon – though, because of electronic trading, buying and selling has for decades actually taken place before the first bell at 9:30 a.m. and after the second one at 4 p.m. New York time.
NYSE Asks Market Participants About 24/7 Trading for Stocks
