题目
The mean monthly return and the standard deviation for three industry sectors are shown in the following exhibit.「huixue_img/importSubject/1564548696861970432.png」Based on the coefficient of variation, the riskiest sector is:
选项
A.utilities.
B.materials.
C.industrials.
答案
B
解析
B is correct. The coefficient of variation (CV) is the ratio of the standard deviation to the mean, where a higher CV implies greater risk per unit of return.「huixue_img/importSubject/1564548697910546432.png」 B正确。 变异系数(CV)是标准差与均值的比值，变异系数越大，单位收益的风险越大。 CV(UTIL)=s/X=1.23%/2.10%=0.59. CV(MATR)=s/X=1.35%/1.25%=1.08. CV(INDU)=s/X=1.52%/3.01%=0.51.