Wagner Assets Management Group holds 3 stocks in their investment portfolio. The amount of the investment and beta of each stock is listed below. Stock Investment Beta A $ 300,000 -0.50 B 500,000 1.20 200,000 1.50 Currently the market expected rate of return is 10%, and the risk-free rate is 4%. Based on Capital Asset Pricing Model (CAPM), the expected return of the portfolio is 8.5% O 11.5% 9.7% 10.3%