The Monday of the 1987 market crash was nicknamed Black Monday.
Black Monday refers to October 19, 1987, when stock markets around the world collapsed. The Dow Jones Industrial Average fell 22.6%, while several other major markets recorded even larger percentage declines. The speed and international reach of the fall made the date a defining financial-market event.
Analysts have linked the crash to high valuations, rising interest rates, trade tensions, investor fear, and computerized trading strategies. No single explanation fully accounts for the scale and timing of the decline.
Black Monday is sometimes confused with Black Tuesday, the name commonly associated with October 29, 1929. The two labels refer to separate crashes in different decades, although both became famous symbols of market panic.