Industrial products are different from agricultural products. Agricultural products are divided into sowing season, mature season and consumption season, so the main contracts of agricultural products are generally three per year, 0 1 contract, 05 contract and 09 contract. Change different contracts according to the schedule.

For industrial products, because it involves the ex-factory price of industrial products and the purchase and sale of spot merchants every month, the main contract is generally the next two months of the month. The situation of rebar is quite special, mainly due to the large inventory, and the debate about long and short in the market is fierce. When long and short can't compete in the contract of 100 1, part of the funds will enter the contract of 1002 in advance for layout.

General industrial products will gradually move their positions to next month's contracts from the beginning of the month.