1. Funds that use hedging means are called hedge funds, also known as hedge funds or hedge funds. It refers to a financial fund whose purpose is to make profits after financial derivatives such as financial futures and financial options are combined with financial instruments.

2. Hedge funds have four trading modes, namely: stock index futures hedging, commodity futures hedging, statistical hedging and option hedging.

3. Stock index futures hedging and commodity futures hedging are the most commonly used trading modes. Among them, the symmetry of stock index futures refers to the behavior of hedging by using unreasonable prices in the stock index futures market to earn the difference, including term hedging, inter-period hedging, cross-market hedging and boasting hedging.

4. Commodity futures hedging is also similar to stock index futures hedging, which refers to buying and selling a certain futures contract, while selling or buying another related contract, and closing both contracts at the same time within a certain period of time.