What was the nickname of the 1987 global stock-market crash?

The 1987 global stock-market crash was nicknamed Black Monday.

The name refers specifically to Monday, October 19, 1987, when major markets plunged. The Dow Jones Industrial Average dropped 508 points, equal to 22.6 percent, while markets in Europe, Asia, and elsewhere also suffered steep declines.

The event demonstrated how quickly modern financial markets could transmit stress across borders. Analysts still debate the relative importance of economic worries, valuation levels, investor psychology, and automated trading strategies. It is distinct from Black Monday in 1929, a term sometimes used for October 28, 1929, and from Black Tuesday, October 29, 1929.