Question: Portofolio P has 30% invested in Stock X and 70% in Stock Y. The risk-free rate id 6% and the market risk premium is 5%. Portofolio P has a required return of 12% and Stock X has a beta of 0.75. What is Stock Y's beta? Apex Roofing's stock has a beta of 1.50, its required return is 14.00%, and the risk-free rate is 5.00%. What is the required rate of return on the stock market?