For futures copper, the daily maximum price fluctuation limit is not more than 3% of the settlement price of the previous trading day, so why does the contract of11still have a decline of more than 4%? "The daily maximum price fluctuation limit of futures copper shall not exceed 3% of the settlement price of the previous trading day:" This is 3% when the book was edited at that time, and the test is based on the contents of the book. This fluctuation will be adjusted at any time, not fixed, and it is currently 6%.