1. Subject matter price of stock index futures contract
2. Domestic and international macroeconomic, stock index futures prices will also show a downward trend.
3. Domestic and international monetary and financial policies: The implementation of monetary and financial policies provided financial support for the fluctuation of China stock market.
4. Investors' psychological expectation: Investors buy stocks in the market in order to hold stocks and gain income.
5. Emergencies: Emergencies refer to major natural disasters, political crises, economic crises and wars.