The Shanghai Composite Index reached its 2015 peak on 12 June 2015, before China’s stock-market sell-off.
The index closed at 5,178.19 after a powerful rally that had begun in 2014. Rising margin lending, enthusiastic participation by individual investors, and expectations of economic support helped drive the advance. Valuations then became increasingly vulnerable to changing confidence.
Prices fell sharply during the summer. The Shanghai Composite dropped more than 8% on 24 August, a day widely associated with the turbulence, and experienced another major fall on 27 July. Chinese authorities responded with measures including trading restrictions, support for selected shares, and changes involving margin finance.
The June peak is different from the dates of the most dramatic daily declines. The sell-off was a multi-week episode, not a single crash day, and it affected global investor sentiment beyond mainland China.