Which Chinese stock index reached its 2015 pre-crash peak on June 12 before a steep summer decline?

The Shanghai Composite reached its 2015 pre-crash peak on June 12, before a steep summer decline. It closed that day at 5,178.19, after more than doubling over the preceding year.

The rally was fueled by abundant margin lending, expectations of economic support, and heavy participation by individual investors. Many buyers used borrowed money, making the market especially vulnerable when prices stopped rising. Authorities responded with measures including trading restrictions, investigations, and support efforts.

The Shanghai Composite then fell sharply, with major drops in June, July, and August 2015. The episode is sometimes called the Chinese stock-market crash, although China has several important equity indexes and exchanges. The Shanghai Composite tracks many Shanghai-listed shares, while the Shenzhen Component represents a different market segment.