Which event name describes the October 1987 worldwide stock-market crash?

Black Monday describes the worldwide stock-market crash that began on October 19, 1987.

The name usually refers to the dramatic trading day when markets plunged across the world. In the United States, the Dow Jones Industrial Average dropped 22.6%, while other major markets also suffered exceptionally large losses.

The crash followed a period of strong share-price increases and growing investor concern about interest rates, international trade, and market valuations. Portfolio insurance programs and other computerized trading strategies generated large sell orders as prices fell, adding pressure to already nervous markets.

Black Monday is sometimes confused with Black Tuesday, the 1929 Wall Street crash’s second major day. The 1987 event was different: the financial system avoided a depression-scale collapse, and coordinated action by central banks and market authorities helped restore confidence. Exchanges later introduced circuit breakers to reduce the speed of future plunges.