Consider historical data showing that the average annual rate of
return on the S&P 500 portfolio over the past 85 years has
averaged roughly 8% more than the Treasury bill return and that the
S&P 500 standard deviation has been about 37% per year. Assume
these values are representative of investors' expectations for
future performance and that the current T-bill rate is 5%.
Calculate the utility levels of each portfolio for an investor with
A = 2. Assume the utility function is U =
E(r) − 0.5 × Aσ2.
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