NO.PZ2018091701000031
问题如下:
Which of the following statement would most likely increase manager’s information ratio?
选项:
A.The portfolio is constrained.
B.The number of securities forecast is decreasing.
C.The portfolio is unconstrained.
解释:
C is correct.
考点:IR的性质
解析: 根据公式IR=TC*IC*√BR, C选项TC=1,相比A可以获得更大的IR。B选项影响BR,BR减小,IR减小。
看讲义,BR指的是只要是independent decisions就算。但是这样的话,基金经理只要疯狂做决定,不就可以拉高IR的值吗?
还是说BR是必须得是导致active return的那种decision才能算进BR? 要如何理解?