Problem 8-14 Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA 4.08 + 0.50RM + A RB-1.28 + 0.70RM + eB OM 178; R-squareд = 0.26; R-squareg = 0.18 Assume you create a portfolio Q, with investment proportions of 0.40 in a risky portfolio P, 0.35 in the market index, and 0.25 in T-bill. Portfolio P is composed of 70% Stock A and 30% Stock B. a. What is the standard deviation of portfolio Q? (Calculate using numbers in decimal form, not percentages. Do not round intermediate calculations. Round your answer to 2 decimal places.) Answer is complete but not entirely correct. 10.98 % Standard deviation c. What is the "firm-specific" risk of portfolio Q? (Calculate using numbers in decimal form, not percentages. Do not round intermediate calculations. Round your answer to 4 decimal places.) Answer is complete but not entirely correct. Firm-specific 0.0025

Essentials Of Investments
11th Edition
ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
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Chapter1: Investments: Background And Issues
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Problem 8-14
Suppose that the index model for stocks A and B is estimated from excess returns with the following results:
RA
= 4.0% +0.50RM + eA
RB
= -1.2% + 0.70RM + eB
OM 17%; R-squareд = 0.26; R-squareg = 0.18
Assume you create a portfolio Q, with investment proportions of 0.40 in a risky portfolio P, 0.35 in the market index, and 0.25 in T-bill.
Portfolio Pis composed of 70% Stock A and 30% Stock B.
a. What is the standard deviation of portfolio Q? (Calculate using numbers in decimal form, not percentages. Do not round
intermediate calculations. Round your answer to 2 decimal places.)
Answer is complete but not entirely correct.
Standard deviation
10.98
c. What is the "firm-specific" risk of portfolio Q? (Calculate using numbers in decimal form, not percentages. Do not round
intermediate calculations. Round your answer to 4 decimal places.)
Firm-specific
%
Answer is complete but not entirely correct.
0.0025 x
Transcribed Image Text:Problem 8-14 Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA = 4.0% +0.50RM + eA RB = -1.2% + 0.70RM + eB OM 17%; R-squareд = 0.26; R-squareg = 0.18 Assume you create a portfolio Q, with investment proportions of 0.40 in a risky portfolio P, 0.35 in the market index, and 0.25 in T-bill. Portfolio Pis composed of 70% Stock A and 30% Stock B. a. What is the standard deviation of portfolio Q? (Calculate using numbers in decimal form, not percentages. Do not round intermediate calculations. Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Standard deviation 10.98 c. What is the "firm-specific" risk of portfolio Q? (Calculate using numbers in decimal form, not percentages. Do not round intermediate calculations. Round your answer to 4 decimal places.) Firm-specific % Answer is complete but not entirely correct. 0.0025 x
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