Which 1987 global stock-market crash is also called Black Monday?

Black Monday was the global stock-market crash of October 19, 1987.

On that day, the Dow Jones Industrial Average fell 508.00 points, or 22.6%, its largest one-day percentage decline. Major markets elsewhere also suffered steep losses, making the event international rather than solely an American collapse.

Several factors were discussed afterward, including high share valuations, rising interest rates, trade tensions, and computerized trading strategies. Portfolio insurance programs could generate additional sell orders as prices fell, potentially accelerating the decline.

The market’s fall was dramatic, but it did not produce a depression like the 1930s collapse. Central banks supplied liquidity, and the U.S. Federal Reserve said it would serve as a source of liquidity. The Dow eventually recovered, illustrating why a single-day percentage fall should not be confused with a long-term bear market.