Futures trading is margin trading. For example, your margin is 10%, and each hand is 10 ton of sugar, with a price of 4,000 yuan per ton. You have 10000 yuan in your account, and you make 10 tons worth 40000 yuan, but you only need to pay 10%, which is 4000 yuan. Once the price of sugar falls, your first hand sugar is 10 ton. If it doesn't come out, the price of sugar will drop by 1 1,000 yuan to 3,000 yuan, and your actual loss is 10 ton, which is 1 1,000 yuan, then the money in your account is gone, and you will be forced to close your position.