期权的问题optiona call,write a call,buy a put,write a

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期权的问题optionacall,writeacall,buyaput,writea期权的问题optionacall,writeacall,buyaput,writea期权的问题optionacall

期权的问题optiona call,write a call,buy a put,write a
期权的问题option
a call,write a call,buy a put,write a

期权的问题optiona call,write a call,buy a put,write a
买入看涨期权 卖出看涨 买入看跌 卖出看跌 4个意思