The futures price limit system means that the transaction price of a futures contract in a trading day cannot be higher or lower than a certain fluctuation range based on the settlement price of the previous trading day, and the quotation beyond this range will be regarded as invalid and cannot be traded. The characteristic of the price limit system implemented in China is "non-stop trading", that is, after the stock price or futures contract price reaches the price limit, the trading is not restricted, and the trading within the price limit can still be carried out until the market closes on the same day.
The domestic futures market, Dalian Commodity Exchange, all varieties of ups and downs rules: Douchi, beans, soybean meal, soybean oil and corn are all 4% of yesterday's settlement price, and there is no price limit rule. Zhengzhou Commodity Exchange: hard wheat: 3%, strong wheat: 3%, cotton: 4%, sugar: 4% Development rules: T2 = t 1 * 150%, T3 = t 1 * 150% Shanghai futures. T3: The third daily limit.