比如隻有qqq, tqqq, 在tqqq跌倒某點時賣出換成qqq。這樣波動比tqqq小些,回報比qqq多些
比如隻有qqq, tqqq, 在tqqq跌倒某點時賣出換成qqq。這樣波動比tqqq小些,回報比qqq多些
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