NO.PZ202207040100000803
问题如下:
In Lazare and Warrack’s comments about Active Share and active risk, the comment that is least accurate is the one concerning:选项:
A.portfolio diversification. B.neutralizing factor exposure. C.increasing idiosyncratic volatility.解释:
SolutionB is correct. The comment concerning neutralizing factor exposure is incorrect: In a single-factor model, if the factor exposure is neutralized, the active risk will be entirely attributable to the Active Share—a consequence of the manager deviating from benchmark weights. The active risk attributed to Active Share will be smaller for more diversified portfolios with lower idiosyncratic risk. Active risk does rise with an increase in factor and idiosyncratic volatility.
A is incorrect. The active risk attributed to Active Share will be smaller for more diversified portfolios with lower idiosyncratic risk.
C is incorrect. Active risk does rise with an increase in factor and idiosyncratic volatility.
我的理解是active risk 包含了active shares(portfolio和Bench March 的weight不同) 和 correlation (portfolio和Bench March)这么理解对吗
- If the factor exposure is fully neutralized, the Active Share will be entirely attributed to the active risk. 这句的理解是 correlation 很高,所以如果还有active risk,那么就是weight 不同=active share 的原因, 这么理解对吗?
- The active risk attributed to Active Share will be smaller in more diversified portfolios. 这句话要如何理解?