Coke 16 1 1 enters the delivery month, and the deposit will be greatly increased. Individual speculators are generally not allowed to enter the delivery month and can hedge. The main coke is the most active contract, and speculation is the main contract. It can be seen that coke 16 1 1 rose sharply, while the main contract 170 1 fell sharply. If you bearish on the coke in the right direction but make the wrong contract, the consequences will be unimaginable.