If only the main contract is made, the holding time will be shorter, and it will be good to hold positions for several months, and some products will last for one or two months. Because futures are leveraged transactions, even a tenth of a product's position may increase your total assets by 10% or even double in a few months, but the risk is also great. If it is not a big institution or hedge, it will not hold positions for too long.

When investing in futures, we usually choose the futures main contract, that is to say, the main contract refers to the contract with the largest position. The life cycle of futures is limited, futures have a delivery date, and the distance between different contracts and delivery date is different, so the turnover of different contracts is also different.

The law of changing the main futures contracts into months is as follows:

1 agricultural products futures: the main contract will be changed in three months: 1, May and September.

2 metal futures: the main contract is to change the month from month to month, but generally it will skip February and sometimes it will skip August. Usually, the main contract month is a contract that is two or three months away from the delivery month.

3. Stock index futures: monthly change, and the main contract month is the delivery month contract.

Different types of futures main contracts have different monthly trading rules, which are mainly related to the differences of different futures trading rules. For example, stock index futures allow individual investors to hold positions in the delivery month, while commodity futures generally do not, so the main contract of stock index futures can be the delivery month.

For investors, trading futures needs to find the main contract. If the transaction is not the main contract, especially the inactive contract, it will easily cause many problems such as liquidity risk and insufficient trading price difference, so the main contract is very important. What are the main futures contracts? How to judge the main contract in futures? 1. What are the main futures contracts? The main contracts of commodity futures are mostly produced in 1, May and September. For example, the contracts of commodity futures 200 1, 2005 and 2009 will take turns as the main contracts with the passage of time. Stock index futures is the main contract of the month. Second, how to judge the main contract in futures? The contract with the largest volume and position in futures is the main contract of this variety. As can be seen from the figure, among the various futures contracts of PP, the maximum turnover of 09 contract is 2.75 million lots, so 09 contract is the main contract of PP at present.