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QUESTION 12 Assume that the single index model holds for all securities and an investor...

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Finance

QUESTION 12 Assume that the single index model holds for all securities and an investor comes up with the following equation for the return of the well diversied portfolio P: rP = 16% + 0.5Rm where Rm is an excess return on the market. The risk-free rate is 2% and the market expected return is 10%. (Tips: Rules on expectation: E(a) = a ; E(x + a) = E(x) + a; where a is a constant) Does APT hold for portfolio P? (4 pts) Does an arbitrage opportunity exist in this economy? If so, what would be an arbitrage strategy? (8 pts) Now suppose that portfolio P is not welldiversied so that: rP = 16% + 0.5Rm + eP where eP is unexpected contribution from portfolio specic risk to the return of P. Does an arbitrage opportunity exist? Why? If yes, what is an arbitrage strategy? (2 pts)

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