- UID
 - 222258 
 - 帖子
 - 393 
 - 主题
 - 141 
 - 注册时间
 - 2011-7-2 
 - 最后登录
 - 2014-6-29 
 
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i swear i'm going bananas.  
 
when calculating the returns attributable to within-sector (i.e. security selection) do I use the benchmark weights or the portfolio weights?  
 
maybe i'm just losing my mind but i feel like i've seen it both ways across qbank, secret sauce, CFAI, and schweser notes. |   
 
 
 
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