The contracts in May and June are tentatively set at 65,438+05% of the contract amount, and the contracts in September and June are tentatively set at 65,438+08% of the contract amount. Futures companies have slightly improved on the basis of the exchange. The margin of recent contracts (May and June) is between16% and 20%, and that of forward contracts (September and 65438+February) is between 20% and 25%.