Which 2015 crash saw China’s Shanghai Composite fall by about 30% in a few weeks?

The 2015 crash in which China’s Shanghai Composite fell by about 30% in a few weeks was the Chinese stock-market crash.

Chinese shares rose rapidly from mid-2014 into June 2015, supported partly by retail investor participation and margin borrowing. The Shanghai Composite reached 5,178.19 on June 12, 2015. It then fell sharply, losing roughly 30% by early July as leveraged investors faced margin calls and confidence weakened.

Chinese authorities responded with measures including trading restrictions, support for share purchases, and investigations into market activity. The volatility continued into 2016, with further large declines and temporary trading halts.

This episode is sometimes incorrectly grouped with the 1997 Asian financial crisis. They were separate events: the 2015 turmoil centered on mainland Chinese equities, while the 1997 crisis began with Thailand’s currency problems.