During the 2015 Chinese stock-market crash, which Shanghai index fell about 8.5% on July 27?

The Shanghai Composite Index fell about 8.5 percent on July 27, 2015, during China’s stock-market crash.

The decline was the index’s largest one-day fall in more than eight years at that point. It came after a dramatic rally and subsequent reversal in Chinese equities. The Shanghai Composite had risen sharply from mid-2014 into June 2015, fueled partly by margin borrowing and strong retail-investor participation. When prices turned down, leveraged positions and falling confidence intensified the selling.

Chinese authorities responded with measures including restrictions on some share sales, support for selected purchases, and investigations into market activity. The Shanghai Composite and Shenzhen markets are separate benchmarks, so their percentage changes should not be treated as interchangeable. The crash was also part of a broader period of volatility extending into 2016.