The Shanghai exchange event that became the symbolic low point of China’s 2015 stock-market crash was Black Monday, August 24, 2015.
On that day, the Shanghai Composite Index fell 8.49 percent, its largest one-day percentage decline since 2007. The drop followed weeks of selling that had already erased a large portion of the market’s gains from the first half of the year.
China’s authorities had tried to support prices through measures including restrictions on some selling, state-linked purchases, and changes to trading rules. International markets also fell as investors worried about China’s economy, currency policy, and demand for commodities.
Black Monday is a recurring market nickname, so it is important to identify the year and exchange. The 2015 Chinese event is distinct from Black Monday in 1987, which referred to a global stock-market crash centered on October 19.