股票这么多?时间一长,结果就与指数差不多,原因:大数定理。
个人最多可以投 7 只个股。多了反而使回报率平均化。
股票这么多?时间一长,结果就与指数差不多,原因:大数定理。
个人最多可以投 7 只个股。多了反而使回报率平均化。
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