Question: Use for part A-C : Consider historical data showing that the average annual rate of return on the S&P 500 portfolio over the past 90

Use for part A-C: Consider historical data showing that the average annual rate of return on the S&P 500 portfolio over the past 90 years has averaged roughly 8% more than the Treasury bill return and that the S&P 500 standard deviation has been about 20% per year. Assume these values are representative of investors expectations for future performance and that the current T-bill rate is 5%.

A. Calculate the expected return and variance of portfolios invested in T-bills and the S&P 500 index with weights as follows:

WT-BILLS WMARKET
0 1.0
.2 ,8
.4 .6
.6 .4
.8 .2
1.0 0

B. Calculate the utility levels of each portfolio of Part A for an investor with a risk aversion of A = 2. What do you conclude?

C. Repeat Part B for an investor with A = 3. What do you conclude?

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