option交易中的问题# Stock
p*2
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第一次买,是下面这几个模式,对吧?
buy put/call to open ->sell put/call to close
sell put/call to open ->buy put/call to close
问题是open和close时strike的面额必须一样吗?
buy put/call to open ->sell put/call to close
sell put/call to open ->buy put/call to close
问题是open和close时strike的面额必须一样吗?