What nickname was given to the sharp global market plunge on March 9, 2020?

The sharp global market plunge on March 9, 2020, was nicknamed Black Monday.

Markets fell as investors reacted to the rapid spread of COVID-19, worsening economic expectations, and a collapse in crude-oil prices after a disagreement between Saudi Arabia and Russia disrupted a production-cut agreement.

The S&P 500 dropped 7.6%, triggering a circuit breaker that temporarily halted U.S. equity trading. Other markets also experienced steep losses, and further sell-offs followed as governments imposed restrictions to slow the pandemic.

The name Black Monday had already been used for major crashes, especially October 19, 1987. The 2020 event is therefore identified by its year or pandemic context when precision is important.