用Excel,输入过去一年SPY的每天涨跌幅度,和A每天涨跌幅度,用Cov(A幅度,SPY幅度)/Var(SPY幅度)
本帖于 2023-02-18 15:23:57 时间, 由普通用户 BullishSolar 编辑
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