1. price discovery: the so-called price discovery refers to the use of open bidding and other trading systems in the market to form a market price that reflects the relationship between market supply and demand. Specifically, the market price can make an expected response to the future trend of the market, and together with the spot market, * * * makes an expectation.

2. Hedging (risk aversion): 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 goods in the spot market in the future, so as to insure the prices of the goods that you buy now or need to buy in the future.

3. Speculative trading: gain trading profits.