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3 November, 04:03

Consider a T-bill with a rate of return of 5 percent and the following risky securities:

Security A: E (r) = 0.15; Variance = 0.04

Security B: E (r) = 0.10; Variance = 0.0225

Security C: E (r) = 0.12; Variance = 0.01

Security D: E (r) = 0.13; Variance = 0.0625

From which set of portfolios, formed with the T-bill and any one of the 4 risky securities, would a risk-averse investor always choose his portfolio?

A. The set of portfolios formed with the T-bill and security A.

B. The set of portfolios formed with the T-bill and security B.

C. The set of portfolios formed with the T-bill and security C.

D. The set of portfolios formed with the T-bill and security D.

E. Cannot be determined.

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Answers (1)
  1. 3 November, 04:56
    0
    The set of portfolios formed with the T-bill and security C since security C

    has the highest reward to volatility ratio.

    Explanation:

    Step 1: Determine the reward to volatility ratio

    The reward to volatility ratio can be expressed as;

    r=R (p) - E (r) / s

    where;

    r=reward to volatility ratio

    R (p) = rate of return

    E (r) = expected risk

    s=standard deviation

    Step 2: Determine r for Security A

    For security A;

    R (p) = 5%=5/100=0.05

    E (r) = 0.15%=0.15/100=0.0015

    s=√variance=√0.04=0.2

    replacing;

    r = (0.05-0.0015) / 0.2=0.2425

    Step 3: Determine r for Security B

    For security B;

    R (p) = 5%=5/100=0.05

    E (r) = 0.10%=0.10/100=0.001

    s=√variance=√0.0225=0.15

    replacing;

    r = (0.05-0.001) / 0.15=0.33

    Step 4: Determine r for Security C

    For security C;

    R (p) = 5%=5/100=0.05

    E (r) = 0.12%=0.12/100=0.0012

    s=√variance=√0.01=0.1

    replacing;

    r = (0.05-0.0012) / 0.1=0.488

    Step 5: Determine r for Security D

    For security D;

    R (p) = 5%=5/100=0.05

    E (r) = 0.13%=0.13/100=0.0013

    s=√variance=√0.0625=0.25

    replacing;

    r = (0.05-0.0013) / 0.25=0.1948

    The set of portfolios formed with the T-bill and security C since security C

    has the highest reward to volatility ratio.
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