The operation of buying hedging is mainly applicable to the following situations: ① It is expected to buy a certain commodity or asset in the future, and if the purchase price has not yet been determined, it is worried that the market price will rise and increase its purchase cost; (2) At present, I don't own a commodity or asset, but I have sold it at a fixed price (at this time, I am in a short position), and I am worried that the rising market price will affect its sales income or procurement cost.