NO.PZ2022122701000017
问题如下：
Bill Weiss, the head of manager research at Harvard Analytics, is
engaged in a performance evaluation of the Fund. Weiss turns his attention to
analyzing performance. Weiss considers both returns-based and holdings-based
attribution methods.
Contrast
the two attribution methods by describing the most appropriate use of each method.
Identify one drawback of each attribution method.
选项：
解释：
Holdings-based到底是看期初还是期末持仓来进行分析？
