Stock index futures is an index futures based on the Shanghai and Shenzhen 300 Index launched by China Financial Futures Exchange established in Shanghai in 2006.

This market consists of exchanges, futures companies and investors. There are 165 futures companies in China, among which international futures companies, yongan futures companies and Shanghai intermediate futures companies account for a large proportion in the market, which is equivalent to the size of Guotai Junan in the stock market you mentioned.