On what date did China’s Shanghai Composite Index fall 8.5% in the 2015 stock-market crash?

China’s Shanghai Composite Index fell 8.5% on August 24, 2015, during the 2015 stock-market crash.

The session became known as “Black Monday” in China and was part of a wider period of turbulence in Chinese equities. The Shanghai Composite closed down 8.49%, its largest one-day percentage decline since February 2007. Selling then spread through other markets, contributing to a worldwide equity sell-off.

The decline followed a dramatic rise in Chinese share prices in the year to June 2015. Investors had used borrowed money to buy shares, and forced selling accelerated when prices turned downward. Concerns about China’s economic growth, the government’s currency move, and uncertainty over official market support added to the pressure.

The 2015 episode is distinct from China’s 2007–08 market decline, even though both involved the Shanghai Composite. It is also distinct from the 2015 currency devaluation itself. The index continued to experience major swings in the following months, so August 24 marked an especially severe session rather than the end of the turbulence.