The current futures contract of coking coal is 928 yuan per ton, and the contract rule is 60 tons as the standard hand. In other words, the first-hand value is 55,000 yuan, and the contract deposit is 5%. In order to control the risk margin +2%, that is, whoever has a 7% margin can do the first hand, 55,000 * 7% = 3,850 yuan. So, basically 3850 yuan can be done.