What nickname described the global stock-market plunge on 9 March 2020?

The global stock-market plunge on 9 March 2020 was nicknamed Black Monday.

The sell-off occurred as investors reacted to the emerging COVID-19 pandemic and a breakdown in negotiations between Russia and Saudi Arabia over oil-production limits. Oil prices fell sharply, intensifying pressure on equity markets worldwide.

The Dow Jones Industrial Average dropped 7.79%, or 2,013.76 points, its largest point decline at that time. Trading was halted temporarily in the United States after circuit breakers were triggered. Major European and Asian indexes also suffered steep losses.

This event is sometimes confused with the 1987 Black Monday, which occurred on 19 October 1987. The 2020 episode was one stage of the broader COVID-19 market crash, which continued through March before markets began recovering.