Which Chinese stock index lost about 8.5% on August 24, 2015, during China’s market turmoil?

The Shanghai Composite lost about 8.5% on August 24, 2015, during China’s stock-market turmoil.

That Monday became known internationally as “Black Monday” because the Shanghai Composite fell 8.49%, its largest one-day percentage decline since 2007. The sell-off followed a sharp rise and subsequent correction in Chinese equities. Concerns included slowing economic growth, falling commodity prices, heavy borrowing to buy shares, and uncertainty about government intervention.

The decline spread to markets around the world. European and U.S. indexes also fell as investors reassessed global growth and risk. Chinese authorities had already taken steps to support prices, including interest-rate cuts and measures involving state-linked funds, but those actions did not immediately restore confidence.

The Shanghai Composite tracks many shares listed in Shanghai and is different from the Shenzhen Component and Hong Kong’s Hang Seng Index. The 2015 episode was a major correction and international shock, but it was not the same event as the 1997 Asian financial crisis or the 2008 global financial crisis.