On October 19, 1987, global financial markets experienced a significant downturn known as Black Monday, during which the Dow Jones Industrial Average declined by approximately 22 percent in a single trading session. The sharp drop marked one of the most severe one-day percentage declines in the history of stock markets and had widespread economic repercussions.

The crash, which occurred on a Monday, triggered panic selling among investors and rippled across major stock exchanges worldwide. The rapid decline in equity prices erased substantial market value, taking nearly two years for the Dow Jones to return to pre-crash levels. Analysts attributed the sudden downturn to a variety of factors, including program trading, overvaluation, and concerns about interest rates and inflation.

The events of Black Monday highlighted vulnerabilities within the global financial system and prompted regulatory bodies to reassess market safeguards to prevent a similar occurrence. Despite the severity of the crash, the markets eventually recovered, although the episode remains a pivotal moment in financial history for its dramatic scale and the impact it had on investment strategies and regulatory policies worldwide.