When P12 =+1, the standard deviation of a two-security portfolio P is equal to the weighted average of the standard deviations of its component securities. Is this statement true? Give reasons for your answer. 3. b) Explain how a portfolio along the efficient frontier is better than other portfolios in the feasibl set? c) Which one of the following portfolios cannot lie on the efficient frontier as described by Markowitz? Portfolio Expected Return Standard Deviation W 9% 21% X 5% 7% Y 15% 36% 12% 15%

Essentials Of Investments
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Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
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Chapter1: Investments: Background And Issues
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Solve subparts 3b and 3c

When P12 = +1, the standard deviation of a two-security portfolio P is equal to the weighted
average of the standard deviations of its component securities. Is this statement true? Give
reasons for your answer.
3.
b)
Explain how a portfolio along the efficient frontier is better than other portfolios in the feasible
set?
c) Which one of the following portfolios cannot lie on the efficient frontier as described by
Markowitz?
Portfolio
Expected Return
Standard Deviation
W
9%
21%
X
5%
7%
Y
15%
36%
12%
15%
Transcribed Image Text:When P12 = +1, the standard deviation of a two-security portfolio P is equal to the weighted average of the standard deviations of its component securities. Is this statement true? Give reasons for your answer. 3. b) Explain how a portfolio along the efficient frontier is better than other portfolios in the feasible set? c) Which one of the following portfolios cannot lie on the efficient frontier as described by Markowitz? Portfolio Expected Return Standard Deviation W 9% 21% X 5% 7% Y 15% 36% 12% 15%
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