开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)|3.2.5(安卓)APP下载

seven-zhu · 2022年07月26日

如题

NO.PZ2016071602000016

问题如下:

A relative value hedge fund manager holds a long position in asset A and a short position in asset B of roughly equal principal amounts. Asset A currently has a correlation with asset B of 0.97. The risk manager decides to overwrite this correlation assumption in the variance-covariance-based VAR model to a level of 0.30. What effect will this change have on the resulting VAR measure?

选项:

A.

It increases VAR.

B.

It decreases VAR.

C.

It has no effect on VAR, but changes profit or loss of strategy.

D.

There is not enough information to answer.

解释:

A is correct. Because the position is both long and short, high correlation implies low risk. Conversely, lowering correlation increases risk.

但是哈,组合求var的公式最后不是加上correlation* var1*var2吗,correlation上升,从公式看,不是应该 var增大吗

1 个答案
已采纳答案

品职答疑小助手雍 · 2022年07月26日

同学你好,注意这里一个是long一个是short所以组合里的correlation应该是两者相关系数的相反数。(负的)