2. You are interested in investing in stock F. You estimate its beta using data on the past returns of the stock, of the market portfolio, and of the risk-free interest rate. After computing the expected rate of return using the CAPM formula, you find that the stock has generated positive alphas over the last month. Find at least two reasons for this that do not put the assumptions of CAPM into question, i.e., that do not involve strong market efficiency, mean-variance preferences, or complete markets (6 lines max). (5 points)