期权 期权交易手续费 = Min(手续费率 × 合约乘数 × 合约面值 × 成交张数，7% × 期权费 × 合约乘数 × 合约面值 × 成交张数) 以 BTCUSD 期权合约为例，假设 BTCUSD 期权的合约乘数为 0.01，面值为 1 BTC，期权费为 0.05 BTC 交易者 A (挂单手续费率 0.02%，吃单手续费率 0.03%) 买入 100 张看涨期权合约 (名义值为 1 BTC)：若成交时交易者 A 为吃单方，则交易手续费 = Min(0.03% × 0.01 × 1 × 100, 7% × 0.05 × 0.01 × 1 × 100) = 0.0003 BTC。若成交时交易者 A 为挂单方，则交易手续费 = Min(0.02% × 0.01 × 1 × 100, 7% × 0.05 × 0.01 × 1 × 100) = 0.0002 BTC。

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