SECTION B: Answer any two questions
QUESTION 1
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= 1.1 Assume an investor utility function U 2E(r) - ¼Aa 2 , where E(r) denotes portfolio
expected returns, A is coefficient of risk aversion which is assumed to be greater than zero and a 2
represent the variance. Show that the investor's utility function is increasing in the portfolio
expected returns and decreasing in its risk.
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½2
1.2 Suppose an investor utility function is presented asu =E(r)- Aa • Use the information below to
answer the following questions.
Portfolio
Standard Bank hares
MTC shares
Capricorn Holding shares
Expected
Return
6%
10%
12%
Standard Deviation
4%
6%
8%
a. Assume an investor with risk aversion A=2, which portfolio yields the highest utility.
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b. Assume an investor with risk aversion A=4, which portfolio yields the highest utility.
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c. Use your answers in a) and b) above to comment on what happened to Utility when risk aversion
increases also advise an investor who is contemplating to invest in one of the three portfolios.[6]
1.3 Suppose the return on RMB Shares was quoted as 10% with a risk premium of 8%. Assume that
the Capital Asset Pricing Model (CAPM) is correct. Use the Security Market Line (SML) to
determine if RMB Shares are correctly prices. The current T-bill rate is 4% and RMB Beta is
estimated to be 0.85.
[6]
1.4 Suppose that a European call option price c= 4; spot price So= 40, T = 6 months; r = 10% per
annum; strike price K =35 and dividends D = 0. Use the put-call parity to calculate the
arbitrage possibilities when p = 5 and p = 4.
[6]
= 1.5 Consider a 20-year bond with the following characteristics. The bond was issued at time t 0
= with face value FV 1000, and annual coupon payment of N$ 10, the current price of the bond
is N$ 1200.77.
i) Calculate the yield to maturity
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= ii) Suppose at t 10, the investor has faced liquidity constraints that prompted him/her to sell
the current. Similar bonds are currently offering 8% coupon rate. At what price should the
investor sell his/her bond?
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