What nickname describes the stock-market crash that began on October 19, 1987?

The stock-market crash that began on October 19, 1987, is known as Black Monday.

The name refers specifically to the Monday when major markets suffered extraordinary losses. The Dow Jones Industrial Average dropped 22.6%, while other national markets also recorded steep falls. The synchronized decline made the event a global crash rather than an isolated Wall Street episode.

Several factors were associated with the sell-off, including concerns about interest rates, trade deficits, equity valuations, and portfolio-insurance strategies. Computerized trading could accelerate selling once prices began to fall, although historians and economists debate the relative importance of each cause.

Black Monday is sometimes confused with Black Tuesday from 1929. Both names describe major crash days, but Black Monday belongs to the worldwide market panic of 1987.