At present, different varieties of commodities listed in futures have different price limits, ranging from 4% to 15%, such as soybean meal 8%, cotton 6%, sugar 6%, iron ore 1 1%, Shanghai and Shenzhen 300 stock index futures 10% and so on.

In addition, futures implement a three-board system. If the closing price limit is set on T day, the price limit on T+ 1 and T+2 will automatically increase by 2%-5%. If the price limit is continuously raised, after the third board, the exchange will decide to stop trading the product on T+3, or continue to open with the price limit on T+2.

Price calculation of daily limit = settlement price of the previous trading day *( 1+ fluctuation range), and price calculation of daily limit = settlement price of the previous trading day *( 1- fluctuation range).

For example, the settlement price of silver 22 12 contract in the last trading day was 4,922 yuan \ kg, and the price limit of silver was 10%, so the price limit of silver 22 12 contract today is 4,922 * (1+10%) = 50.