What was the nickname of the Shanghai stock-market crash on August 24, 2015?

The Shanghai stock-market crash on August 24, 2015, was widely nicknamed Black Monday.

China’s Shanghai Composite Index fell 8.49% that day, its largest one-day percentage decline since February 2007. The drop followed weeks of severe volatility and a broader sell-off in Chinese equities that had begun after the index’s June 2015 peak.

Investor concerns included slowing Chinese economic growth, falling commodity prices, and uncertainty about government efforts to support the market. Selling quickly spread to other global markets, including major European and U.S. indexes.

“Black Monday” is not unique to this episode: the same nickname is used for several major market declines, including October 19, 1987. The date and the Shanghai Composite’s 8.49% fall identify the 2015 Chinese event precisely.