Futures can be bought and sold. The order you bought is called multiple orders, and the order you sold is called empty orders. When you buy or sell an order that you sell, this buying or selling action is called liquidation.

Futures can be long or short, and the target is the stock index (currently the Shanghai and Shenzhen 300 Index). In our current A-share market, only by doing more can we make money (that is, only by buying low and selling high can we make money). Stock index futures can make corresponding long or short operations by predicting the rise and fall of specific indexes (such as the Shanghai and Shenzhen 300 Index), and can make money when the market rises and falls. Similar to the current thinking.

The way to make money when the market falls is to buy when the index falls (that is, to make money when it falls, and to lose money when it rises), and at the same time, to smash the market with the chips in hand (usually heavyweights, because the weight has a great influence on the 300 index), because the leverage of stock index futures is much greater than that of stock trading. Therefore, the money that the main force loses by shorting its chips can be earned back by betting on the decline of the index. This is the "speculative" embodiment reflected by the enlarged market of stock index futures. In mature markets, stock index futures are generally used for hedging. The so-called hedging is mainly based on stock operation, and at the same time, reverse betting chips are set on stock index futures to ensure small wins or losses.