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^2(rj) ^2(Ej) E(r) stock x .10 .02 .75 .12 ^2 (rM) =(.25) stock y .30 .03 2.0 .16 (a) Calculate the beta for portfolio consisting
^2(rj) ^2(Ej) E(r)
stock x .10 .02 .75 .12
^2 (rM) =(.25)
stock y .30 .03 2.0 .16
(a) Calculate the beta for portfolio consisting of 25% in x AND 75% in y. (10 points)
(b) Under the index model, calculate the variance of the portfolio in section (a). (10 points)
(c) Suppose the expected market return on the market is 0.11 and the risk-free rate is 0.06. Assuming the simple CAPM is correct, are stock x and y fairly priced? Why or why not? (10 points)
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