(1) Commodity futures, especially copper futures, have a certain economic cycle correlation, and the contract price of agricultural products is greatly affected by seasonal factors, while commodity futures, especially copper futures, have a certain economic cycle correlation.

(2) Seasonal influence. The seasonal fluctuation of copper price is obvious, and it is lower every year 1 month and higher in August. This is mainly because the demand for copper in industrial and mining enterprises has increased; Copper prices are rising faster than spot prices; In addition, the copper contract is greatly affected by the external disk.