1. bear the price risk. The futures market is a market where hedgers transfer risks. Hedgers hate risks, while speculators love them. Two people get what they need and win each other.

2. Increase liquidity. Speculators frequently open positions and hedge contracts, which increases the trading volume in the futures market. Even if hedging transactions are easy to clinch, it can also reduce the price fluctuations that traders may cause when they enter and leave the market.

3. Keep the price system stable. Commodity prices in various futures markets are highly correlated with the prices of different commodities.

4. Form a reasonable price level. Speculators buy futures at a low price, increase demand and lead to price increase, and sell futures at a higher price level, reducing demand, thus stabilizing prices and stabilizing price fluctuations, thus forming a reasonable price level.