I wonder if you understand what 090 1 means. Let's teach fish to swim. Explain first.

090 1 means delivery in June 2009.

Futures contracts are very special.

Generally, if there is no special reason, they will be the main contract in each contract. In addition to hedging and arbitrage customers.

What is the main contract?

That's a good question. The contract with the largest position and turnover is the main contract.

Then why do you want to make the main contract and not make other contracts?

The main contract has the largest turnover and positions, so it is very active. In this way, the quotation is continuous and will fluctuate according to the trend. If you choose a contract near the delivery month, it is likely that you will hold positions until the delivery month because the contract is inactive, which will lead to forced liquidation or physical delivery (Zhengzhou Stock Exchange speculators can participate in delivery).

I think you can get a general idea.

If the explanations given by other experts and younger brothers are incorrect, please let me know!