You compute the optimal risky portfolio to have the expected return of 12% and standard deviation of 20%. The risk free rate is 4%. VWhat will be the standard deviation of the complete portfolio of risk free asset and the optimal risk portfolio, for a risk averse investor with risk aversion index A=6. O 1.11 O 3.33

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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### Optimal Risky Portfolio Calculation

**Question:**
You compute the optimal risky portfolio to have the expected return of 12% and standard deviation of 20%. The risk-free rate is 4%. What will be the standard deviation of the complete portfolio of the risk-free asset and the optimal risk portfolio for a risk-averse investor with risk aversion index A=6.

**Options:**
- 1.11
- 3.33
- 5.67
- 6.67
- None of the above

**Explanation:**
To solve this problem, you'll need to use the following formula for the standard deviation of the complete portfolio when combining a risk-free asset and the risky portfolio:

\[ \sigma_C = y \cdot \sigma_P \]

Where:
- \( \sigma_C \) is the standard deviation of the complete portfolio.
- \( y \) is the proportion of the risky asset in the complete portfolio.
- \( \sigma_P \) is the standard deviation of the risky portfolio.

Step-by-step, you typically first calculate the proportion \( y \) based on the risk aversion index \( A \), and the expected excess return over the risk-free rate.

For educational purposes, detailed calculations and explanations can follow up, ensuring students understand every step involved in achieving the correct answer.
Transcribed Image Text:### Optimal Risky Portfolio Calculation **Question:** You compute the optimal risky portfolio to have the expected return of 12% and standard deviation of 20%. The risk-free rate is 4%. What will be the standard deviation of the complete portfolio of the risk-free asset and the optimal risk portfolio for a risk-averse investor with risk aversion index A=6. **Options:** - 1.11 - 3.33 - 5.67 - 6.67 - None of the above **Explanation:** To solve this problem, you'll need to use the following formula for the standard deviation of the complete portfolio when combining a risk-free asset and the risky portfolio: \[ \sigma_C = y \cdot \sigma_P \] Where: - \( \sigma_C \) is the standard deviation of the complete portfolio. - \( y \) is the proportion of the risky asset in the complete portfolio. - \( \sigma_P \) is the standard deviation of the risky portfolio. Step-by-step, you typically first calculate the proportion \( y \) based on the risk aversion index \( A \), and the expected excess return over the risk-free rate. For educational purposes, detailed calculations and explanations can follow up, ensuring students understand every step involved in achieving the correct answer.
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