Which event name describes the October 1987 global stock-market collapse?

The event name for the October 1987 global stock-market collapse is Black Monday.

Black Monday refers to October 19, 1987, when stock markets around the world suffered severe losses. The Dow Jones Industrial Average fell 22.6% in one session, while major markets in Europe, Asia, and elsewhere also declined. It remains one of the most dramatic synchronized market falls on record.

The crash followed a period of strong gains and rising concern about valuations, interest rates, international trade, and market mechanics. Computer-assisted trading and portfolio-insurance strategies may have accelerated selling, although historians and economists continue to debate the precise combination of causes.

The name can cause confusion because “Black Monday” has also been used for other financial events. In stock-market history, the unqualified term most commonly means October 19, 1987. The 1929 crash’s famous dates instead include Black Thursday, Black Monday, and Black Tuesday.