The opening price of futures is 8: 50-8: 54 call auction and 8: 54-8: 55 computer matching. Take the maximum turnover as the opening price of the day.

The closing price is the final transaction price of a commodity on that day.

The opening price is set by the majority of traders on the floor, and the order will be placed in call auction from 8: 50 to 8: 54 in four minutes.