The Shanghai Composite’s largest single-day percentage drop during China’s 2015 stock-market crash was 8.48%.
The decline occurred on July 27, 2015, when the index plunged as investor confidence weakened after a rapid earlier rise. Concerns included high valuations, leveraged share purchases, slowing economic growth, and uncertainty about government intervention.
China’s regulators introduced several measures to stabilize prices, including restrictions on certain sales, support for share purchases, and investigations into market activity. These actions produced temporary rebounds but did not immediately restore lasting confidence.
The turmoil continued into 2016, when further sharp falls triggered newly introduced circuit breakers. The Shanghai Composite’s percentage loss is distinct from losses in other Chinese benchmarks, such as the Shenzhen Composite or the Hang Seng Index.