As the opening time of stock index futures is much earlier than that of the stock market, it has also become the weather vane of the stock market, and investors will measure today's stock market according to the performance of the stock index futures market.

2. Stock index futures can transfer funds.

When the stock market does not perform well, funds will flow out of the stock market and into the stock index futures market. When stock index futures perform poorly, funds will flow out of the stock index market and into the stock market. At the same time, large investment institutions will also use the stock index futures market to short the stock market. So there will be frequent transfer of trading funds.

3. Stock index futures can affect the stock market price.

If HSI futures perform well, the trading volume of Hang Seng market will be active. Similarly, if the Shanghai and Shenzhen 300 Index performs well, then the domestic stock market will also perform well. Therefore, stock index futures can affect the price of the stock market.