NO.PZ2018070201000056
问题如下:
Vishal Chandarana is a risk-averse investor. He will apply utility theory to choose the investment portfolio. His utility function is expressed as U=E(r)-1/2×A×σ^2
The table shows the expected return and expected standard deviation of several investments, assuming the measure of risk aversion is 2, he is most likely to invest:
选项:
A.1
B.2
C.3
解释:
B is correct
Investment 2 has the highest Utility Value(0.2019).
1、为啥一个风险厌恶者要选择效用最大的组合?
2、给定的一个效用水平下,A的值,风险厌恶的程度也是不同的,对吧?根据效用公式,A是斜率,但是一条效用曲线上,A会变大。对于同一个人,A不是应该恒定吗?有点糊涂
3、对于一个人有多条效用曲线,如何理解?是比如存钱,有一个效用。买股票有一个,买房子有一个。对他投资的不同东西,他的效用不同,是这样理解吗?
总觉得这里似懂非懂