The division of main force and secondary force in futures is based on volume. The largest transaction volume is the main contract, followed by the secondary contract, which is also the two main contracts for investors to trade.

The main contracts of commodity futures are mostly produced in three contracts: 65438+ 10/May/September. For example, 190 1, 1905, 1909 will be the main contracts in turn with the passage of time. Stock index futures is the main contract of the month. The life cycle of a futures contract is limited, and it will be delivered after the last trading day of the contract. The so-called main contract refers to the contract with the largest position. Under normal circumstances, the contract with the largest position has the largest turnover. Because it is the most active contract in the market and the easiest contract to clinch, speculators are basically participating in this contract.