"Aviation oil hedging" is a kind of "hedging". Hedging refers to a trading activity that regards the futures market as a place to transfer price risk, and uses futures contracts as a temporary substitute for buying and selling commodities in the spot market in the future to insure the prices of commodities it needs to buy in the future. The basic practice of hedging is to buy and sell the same commodity in the same quantity but in the opposite direction in both the spot market and the futures market, that is, to buy or sell the same quantity of futures in the futures market at the same time. After a period of time, when the price changes make the gains and losses in spot trading, the losses in futures trading can be offset or compensated, thus minimizing the price risk.