What was the nickname for the 8.49% Shanghai Composite drop on August 24, 2015?

The 8.49% Shanghai Composite drop on August 24, 2015, was widely called Black Monday.

China’s Shanghai Composite Index fell 8.49% on August 24, 2015, in a sell-off that spread anxiety through global markets. The decline followed a turbulent period in which Chinese mainland shares had risen sharply and then begun falling, raising concerns about valuations, economic growth and government market interventions.

The term Black Monday echoed the name used for earlier market crashes, especially October 19, 1987. It does not mean that every market recorded its largest-ever percentage fall on that date. China’s broader market turmoil continued after August 24, with additional sharp declines later in the year.

Authorities had already used measures such as trading restrictions, state-fund purchases and changes to margin rules in attempts to stabilize prices. The episode highlighted the growing importance of Chinese equities to international investor sentiment, even though mainland markets remained subject to distinctive regulations and access limits.