侯同学2023-06-11 19:05:04
Timmon then asks Richard why holdings-based attribution can generate a residual term between the portfolio performance and benchmark performance. Richard responds that the residual term cannot be explained by an action taken by the fund manager, but it could result from transactions occurring more frequently than the holdings assessments for the fund.为什么这段话是对的?为什么hodling base attribution的情况下,不能generate residual due to manager action?
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开开2023-06-12 13:34:51
同学你好,这个residual term是指组合实际的active return(Rp-Rb)和attribution effect之差,即active return(Rp-Rb)和总的attribution effect不完全一致。
brinson model也是一类holding based attribution,可以理解为allocation+interaction+selection effect加起来不等于RA。
因为基金经理的行为(包括配置和选股)的因素都已经包含在归因分析中了,那么只能解释为在holding based attribution分析期间有交易发生,而holding based attribution无法捕捉交易带来的变化。它都是用期初的持仓进行分析的。
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请问什么叫attribution effect?
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比如说我们讲的brinson model中的allocation 、interaction和select effect就是attribution effect。
如果没有residual term,这些effect应该和组合的active return是相等的。
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