卖put卖call能挣premium，从别人那收过路费。买反指对冲是交两倍的费用实现零倍的效果。差别海了去了。

来源: lanyin0314 于 2023-05-08 08:48:15 [旧帖] [给我悄悄话] 本文已被阅读：次

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