The Shanghai Composite reached its pre-crash peak on June 12, 2015, during the 2015 Chinese stock-market crash. The index closed that day at 5,178.19 points.
Chinese equities had risen sharply for roughly a year, supported by retail participation, margin borrowing, and expectations that policy would remain favorable. The rapid advance pushed valuations higher and made the market vulnerable to a shift in sentiment.
After the June peak, prices fell steeply. Authorities responded with measures including restrictions on some selling, support for share purchases, and investigations into market activity. The turbulence continued through the summer and included another severe global-market shock on August 24, often called Black Monday in China.
The June peak should not be confused with the market’s later low points. It marks the start of the major reversal, whereas August 24 identifies a particularly dramatic trading day during the continuing decline.