White Company stock has a beta of 1.5 and a required return of 15%, while Black Company stock has a beta of 1.0 and a required return of 12%.

White Company stock has a beta of 1.5 and a required return of 15%, while Black Company stock has a beta of 1.0 and a required return of 12%. The standard deviation of returns for White Company is 10% more than the standard deviation for Black Company. The expected return on the market portfolio according to the CAPM is;