Short position: indicates that the investor's account equity is negative. It shows that investors not only lost all the margin, but also owed debts to futures brokerage companies. Due to the daily liquidation system and the compulsory liquidation system in futures trading, there will be no short positions in general. However, in some special circumstances, such as the gap change in the market, accounts with heavy positions and opposite directions may explode. When there is a short position, investors must make up the deficit in time, otherwise they will face legal recourse. In order to avoid this situation, it is necessary to control positions specially and avoid Man Cang operation like stock trading. And track the market in time, and you can't buy it like a stock market.

There are two kinds of empty positions. One case is that futures customers still owe money to the futures exchange after liquidation, that is, the floating profit and loss of the account is greater than or equal to the total amount of funds in the account, that is, the customer's equity is less than or equal to 0. Because the market changes too fast, investors can't maintain the original contract without adding margin. The margin caused by forced liquidation due to insufficient margin is "zero", commonly known as "short position" and "through position"