NO.PZ2023021601000013
问题如下：
With respect to an investor’s utility function expressed as: U=E(r)-0.5Aσ^2, which of the following values for the measure for risk aversion has the least amount of risk aversion?
选项：
A.−4.
B.0
C.4
解释：
A negative value in the given utility function indicates that the investor is a risk seeker.只需要判断A就可以，不需要考虑效用吗
