Financial Management Explain the criteria for assessing performance of a security, namely, expected rate of return, standard deviation of rate of ret

Financial Management
Explain the criteria for assessing performance of a security, namely, expected rate of return, standard deviation of rate of return, and coefficient of variation (CV). Explain how by forming a portfolio an instrument can be generated that has properties better than each of its constituents in terms of the standard deviation of rate of return and CV.