investor can design a risky portfolio based on two stocks, A and B. Stock A has an expected return of 16% and a andard deviation of return of 25%. Stock B has an expected return of 11% and a standard deviation of return of 10%. The -rrelation coefficient between the returns of A and B is .4. The risk-free rate of return is 9%. The proportion of the optimal ky portfolio that should be invested in stock B is approximately Multiple Choice 48% 56% 44% 52 %