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16 August, 05:39

A stock has a beta of 1.4, an expected return of 17.2 percent, and lies on the security market line. A risk-free asset is yielding 3.2 percent. You want to create a portfolio that is comprised of the stock and the risk free and will have a portfolio beta of 0.6. What is the expected return on this portfolio?

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  1. 16 August, 06:49
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    the portfolio's return will be Ep (r) = 9.2 %

    Explanation:

    if the stock lies on the security market line, then the expected return will be

    Ep (r) = rf + β * (E (M) - rf)

    where

    Ep (r) = expected return of the portfolio

    rf = risk free return

    E (M) = expected return of the market

    β = portfolio's beta

    then

    Ep (r) = rf + β * (E (M) - rf)

    E (M) = (Ep (r) - rf) / β + rf

    replacing values

    E (M) = (Ep (r) - rf) / β + rf

    E (M) = (17.2% - 3.2%) / 1.4 + 3.2% = 13.2%

    since the stock and the risk free asset belongs to the security market line, a combination of both will also lie in this line, then the previous equation of expected return also applies.

    Thus for a portfolio of β=0.6

    Ep (r) = rf + β * (E (M) - rf) = 3.2% + 0.6 * (13.2%-3.2%) = 9.2 %

    Ep (r) = 9.2 %
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