If you are bearish, you can sign a contract with the buyer and sell it at a high price. After the market price of goods falls, you can buy goods at a low price in the market and sell them at an agreed high price to make money.

For example, if you think the stock index will fall, you need to sell the first-hand stock index futures in May in 3396 (that is, you can sell 300 stock indexes to the buyer at the price of 3396 yuan on any trading day before the delivery date in May, and the margin is 10 18800 yuan), and you need to pay it to the exchange at the price of 15%. If you buy a position on 3 196 (equivalent to buying goods on 3 196 and selling them to the buyer at the contract price of 3396). Earnings per hand: (3396-3196) × 300 = 60,000 yuan (the handling fee is ignored).