5. Portfolio Beta Portfolio beta can be computed in the same way as portfolio return was computed. If stock A had a beta of 1.5 and stock B had a beta of -0.60, the beta of a portfolio comprised of both these stocks would be: Portfolio beta = WABA + WBBB = 0.3 (1.5) + 0.70 (-0.6) = 0.45 + (-0.42) = 0.03 %3D The Excel application is also similar to how it was for potfolio return. Since you know the result for portfolio beta already (0.03), try and obtain it again in Excel. Note: There is no need to compute the beta of the market. It is 1 by default

EBK CONTEMPORARY FINANCIAL MANAGEMENT
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Chapter8: Analysis Of Risk And Return
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5. Portfolio Beta
Portfolio beta can be computed in the same way as portfolio return was computed. If stock
A had a beta of 1.5 and stock B had a beta of -0.60, the beta of a portfolio comprised of both
these stocks would be:
Portfolio beta =WABA + WBBB = 0.3 (1.5) + 0.70 (-0.6) = 0.45 + (-0.42) = 0.03
The Excel application is also similar to how it was for potfolio return. Since you know the
result for portfolio beta already (0.03), try and obtain it again in Excel.
Note: There is no need to compute the beta of the market. It is 1 by default
Transcribed Image Text:5. Portfolio Beta Portfolio beta can be computed in the same way as portfolio return was computed. If stock A had a beta of 1.5 and stock B had a beta of -0.60, the beta of a portfolio comprised of both these stocks would be: Portfolio beta =WABA + WBBB = 0.3 (1.5) + 0.70 (-0.6) = 0.45 + (-0.42) = 0.03 The Excel application is also similar to how it was for potfolio return. Since you know the result for portfolio beta already (0.03), try and obtain it again in Excel. Note: There is no need to compute the beta of the market. It is 1 by default
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