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 25% per year. Assume these values are representative of investors' expectations for future performance and that the current T-bill rate is 4%. Calculate the expected return and variance of portfolios invested in T-bills and the S&P 500 index with weights as shown below. (Enter your answers as decimals rounded to 4 places. Leave no cells blank - be certain to enter "O" wherever required.) WBills WIndex Expected Return Variance 0.0 1.0 0.1200 0.0625 Example 0.2 0.8 0.4 0.6 0.6 0.4 0.8 0.2 1.0 0.0

EBK CONTEMPORARY FINANCIAL MANAGEMENT
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Chapter8: Analysis Of Risk And Return
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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 25% per year. Assume these
values are representative of investors' expectations for future performance and that the current T-bill rate is 4%.
Calculate the expected return and variance of portfolios invested in T-bills and the S&P 500 index with weights as shown below. (Enter
your answers as decimals rounded to 4 places. Leave no cells blank - be certain to enter "O" wherever required.)
WBills
WIndex
Expected Return
Variance
0.0
1.0
0.1200
0.0625 Example
0.2
0.8
0.4
0.6
0.6
0.4
0.8
0.2
1.0
0.0
Transcribed Image Text: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 25% per year. Assume these values are representative of investors' expectations for future performance and that the current T-bill rate is 4%. Calculate the expected return and variance of portfolios invested in T-bills and the S&P 500 index with weights as shown below. (Enter your answers as decimals rounded to 4 places. Leave no cells blank - be certain to enter "O" wherever required.) WBills WIndex Expected Return Variance 0.0 1.0 0.1200 0.0625 Example 0.2 0.8 0.4 0.6 0.6 0.4 0.8 0.2 1.0 0.0
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