What was the name of the 1987 stock-market crash’s record-breaking trading day?

The record-breaking trading day in the 1987 stock-market crash was called Black Monday.

Black Monday occurred on October 19, 1987. The Dow Jones Industrial Average fell 508 points, or 22.6%, in one session. That percentage decline remains the largest single-day percentage fall in the Dow’s history.

The crash spread rapidly through international markets. Hong Kong fell first, European exchanges followed, and markets in the United States then suffered their dramatic decline. Analysts have discussed several contributing factors, including overvalued shares, rising interest rates, investor anxiety, and computerized portfolio-insurance strategies.

Black Monday is sometimes confused with the similarly named market days of 1929, especially Black Tuesday. The 1987 crash also differed from 1929 because the economy did not enter a depression on the same scale, although confidence and market values were severely shaken.