比如只有qqq, tqqq, 在tqqq跌倒某点时卖出换成qqq。这样波动比tqqq小些,回报比qqq多些
比如只有qqq, tqqq, 在tqqq跌倒某点时卖出换成qqq。这样波动比tqqq小些,回报比qqq多些
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