請問變異係數CV為負值判定法 - 經濟

By Emily
at 2009-05-14T20:27
at 2009-05-14T20:27
Table of Contents
CV=標準差/報酬率 其值越小越好 比如CV =0.3與0.1
0.1者優於0.3
但是實際中,報酬率常有負值的時候,這時變為-0.3與-0.1
這時最小的為-0.3
所以請問這時要如何判斷哪一值較好
--
0.1者優於0.3
但是實際中,報酬率常有負值的時候,這時變為-0.3與-0.1
這時最小的為-0.3
所以請問這時要如何判斷哪一值較好
--
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