What nickname was given to the 1987 crash day when London’s FTSE 100 fell 10.8%?

The 1987 crash day when London’s FTSE 100 fell 10.8% was nicknamed Black Monday.

The date was October 19, 1987, when markets around the world experienced severe losses. London’s decline followed sharp falls in Asian markets and coincided with the historic plunge in the U.S. Dow Jones Industrial Average. The FTSE 100’s fall was one of the largest single-day drops in its history.

The nickname can cause confusion because “Black Monday” is also used for other market events, including October 28, 1929, and the 2020 market turmoil. In the context of the worldwide 1987 crash, however, it refers specifically to October 19. The episode led to changes in market regulation and trading safeguards, including circuit-breaker mechanisms designed to slow panic selling.