The "Opening Bell" refers to the signal that marks the beginning of the trading day on stock exchanges, such as the New York Stock Exchange (NYSE) and the NASDAQ. It typically occurs at 9:30 AM Eastern Time in the United States. The ringing of the bell is a ceremonial event that often involves company executives or notable figures, symbolizing the start of trading activities for the day. The Opening Bell is significant because it sets the tone for the market, influencing investor sentiment and trading volume. Following the bell, traders and investors can buy and sell stocks, impacting the prices of various securities. The event is often broadcasted live, attracting attention from financial news outlets and the public.