The underlying contract of stock index futures is the stock index, that is, the underlying index.

Index investment is a combination of index sample stocks with weights as allocation ratios.

Common underlying indexes include the Standard & Poor's 500 Stock Price Composite Index (S&PS00), the New York Stock Exchange Stock Price Composite Index (NYCE Composite), the Major Market Index (MMI), and the Value Line Composite Stock Price Average Index (Value'neCompositeIndex). ), Nikkei Index (NIKI), Hong Kong's Hang Seng Index, etc. my country's first stock index futures contract is based on the CSI 300 Index. The CSI 300 Index is a unified market index, and its total market value accounts for about 70% of the Shanghai and Shenzhen markets. , the circulating market value accounts for nearly 60% of the Shanghai and Shenzhen markets, with high market value coverage, strong representativeness, and high market recognition. It is currently the most suitable index for stock index futures in the Shenzhen and Shanghai markets.