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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