Which Chinese stock-market benchmark fell about 8.5% on August 24, 2015, in the “Black Monday” sell-off?

The Shanghai Composite fell about 8.5% on August 24, 2015, during a severe Chinese stock-market sell-off often called “Black Monday.” The index’s decline reflected a broader loss of confidence in Chinese equities, economic growth, and official market-support measures.

Chinese shares had surged during the preceding year, helped by investor enthusiasm, margin borrowing, and expectations of continued economic expansion. The market began falling in June 2015. Authorities attempted interventions including trading restrictions, reductions in interest rates, and support for selected shares, but volatility remained intense.

The August 24 session also affected markets worldwide. Investors worried about China’s growth and commodity demand, while falling prices encouraged further risk reduction. The event was part of a longer period of turbulence rather than an isolated one-day collapse.

The Shanghai Composite tracks shares listed on the Shanghai Stock Exchange. It is distinct from Hong Kong’s Hang Seng Index and from mainland Chinese blue-chip indexes such as the CSI 300.