Stock index futures are futures contracts with the stock price index as the subject matter. You can trade in the opposite direction, that is, buy short or short.

Buying short is buying stock index futures contracts. According to the trend of the stock market, investors are optimistic about the market outlook and predict that the stock price will rise, so they buy a stock index futures contract and sell it at a low price at the time stipulated in the contract, so as to achieve the purpose of buying low and selling high and gain benefits from it.

Short selling refers to selling stock index futures contracts. According to the stock price trend, investors predict that the stock index futures price will show a downward trend, so they sell the stock index futures contract in a certain delivery month in advance. Once it falls, he will buy the futures contract sold before at a low level to get the difference.