Official actions run the gamut, including a $480 billion government-supported equity-market backstop under the auspices of the China Securities Finance Corporation, a $19 billion pool from major domestic brokerages, and an open-ended promise by the People’s Bank of China (PBOC) to use its balance sheet to shore up equity prices. Moreover, trading was suspended for about 50% of listed securities (more than 1,400 of 2,800 stocks).