question on sell a call

来源: KaLiLuHa 于 2011-01-03 23:07:56 [档案] [博客] [旧帖] [给我悄悄话] 本文已被阅读：次 (236 bytes)

Let's say, I have 100sh of CSCO bought at the price of $19, now if I *sell* a call for CSCO at $21 in March, does it mean my 100sh will be associated to that call I sell? or I am indeed using my margin on this call? Thanks!

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