NO.PZ2019012201000012
问题如下:
Matt observes its equity index benchmark’s Herfindahl–Hirschman Index (HHI) is 0.03127. Therefore, the benchmark most likely:
选项:
A.
has an effective number of stocks of approximately 32.
B.
a well-diversified index.
C.
has a concentration level of 7.1.
解释:
A is correct.
考点:Herfindahl–Hirschman Index=
解析:HHI衡量投资组合中的股票集中风险,计算方法为: 。使用HHI,我们可以估计在同等权重下的有效股票数量,它等于HHI的倒数。HHI是0.03127,倒数(1/0.03127)是31.97。因此,模仿指数基准的有效股票数量约为32只。
这里选B的前提,是不是需要这个index是equal weighted index?