Which 2015 crash saw China’s Shanghai Composite fall sharply after a speculative stock-market boom?

The 2015 crash in which China’s Shanghai Composite fell sharply after a speculative boom was the Chinese stock-market crash.

Chinese mainland shares rose dramatically during the year ending in June 2015. The rally attracted large numbers of retail investors and was supported in part by margin borrowing, which allowed traders to buy shares with borrowed money. When confidence reversed, forced selling intensified the decline.

The Shanghai Composite peaked on 12 June 2015 and then lost a large portion of its value over the following weeks. Chinese authorities responded with measures including trading suspensions, restrictions on some share sales, and efforts to stabilize major companies and brokerages.

The episode continued into 2016 and is often described as Chinese stock-market turbulence rather than one isolated crash. It affected global sentiment, although the direct impact on the world economy differed from the 2008 crisis.