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【单选题】
下列关于期权投资策略的说法中，不正确的是( )。A.
保护性看跌期权锁定了最低净收入和最低净损益，并不影响净损益的预期值
B.
抛补看涨期权指的是购买1股股票，同时出售该股票的1股股票的看涨期权
C.
多头对敲是同时买进一只股票的看涨期权和看跌期权，它们的执行价格、到期日都相同
D.
多头对敲策略对于预计市场价格将发生剧烈变动，但是不知道升高还是降低的投资者非常有用
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