Consider a market where two factors are sufficient to describe the returns on common stocks. For an
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Question:
Consider a market where two factors are sufficient to describe the returns on common stocks. For an asset i the assets expected return is given by Eri rf beta ilambda beta ilambda where lambda and lambda are the factor premiums expected return of the factors in excess of the riskfree rate Both factors are independent. The following table gives the sensitivities of the stocks ABC and PQR to the two factors, as well as the expected returns of each stock Hint: Portfolio betas are weighted averages of individual stock betas. This is also true for betas for each factor:
Security beta ibeta i ERi
ABC
PQR
Riskfree
a Consider a portfolio, C made up by selling short $ of security PQR and purchasing $ of ABC. How sensitive will this portfolio be to each of the two factors?
b Consider a portfolio, D made up by borrowing $ at the riskfree rate and investing $ in portfolio C How sensitive will this portfolio be to each of the factors?
c What combination of securities ABC, PQR and the riskless security will move on a onetoone basis with factor and be insensitive to factor
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