问题如下:
To address Gerber’s tail risk concern, Petit should recommend that expected correlations with their models:
选项:
A.decrease.
B.do not change.
C.increase.
解释:
C is correct.
Increasing the correlations would likely increase the number of extremely unusual outcomes and, thereby, increase estimated tail risk. Higher correlations in the model increase the dispersion of outcomes (effectively decreasing diversification).
为什么Higher correlation会降低分散化效果?