# 保证金制度

维持保证金是维持持仓所需的最低保证金。若未实现亏损使仓位保证金低于此阈值，则触发强制平仓。BBX 采用分级风险框架来设定维持保证金要求。随着持仓名义价值的增加，所需的维持保证金率也会增加。

计算公式：维持保证金 (MM) = 仓位价值 × 维持保证金率

* 仓位价值 = 合约数量 × 标价
* 初始保证金（IM） = 仓位价值 ÷ 杠杆率

交易者应密切关注利润率、清算价格、持仓规模与风险等级的关系。保持充足的保证金可以降低清算风险，尤其是在市场波动剧烈的时期。


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