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    Question

    In the Capital Asset Pricing Model (CAPM), the beta (β)

    of a security measures its:
    A Total risk (standard deviation). Correct Answer Incorrect Answer
    B Diversifiable (unsystematic) risk. Correct Answer Incorrect Answer
    C Non-diversifiable (systematic) risk relative to the market. Correct Answer Incorrect Answer
    D Expected return. Correct Answer Incorrect Answer
    E Idiosyncratic variance. Correct Answer Incorrect Answer

    Solution

    Beta (β) measures the sensitivity of a security's returns to movements in the overall market portfolio. It quantifies the systematic risk—the portion of risk that cannot be eliminated through diversification. The CAPM formula is: E(Ri) = Rf + βi (E(Rm) - Rf).

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