Mr. Orbiso is an investor and wants to build a portfolio using only U.S. T-bills and an index fund that closely tracks the S&P 500 Index. The T-bills have a return of 4.5%. The S&P 500 has a standard deviation of 15% and an expected return of 12%.

1. Mr. Orbiso wants to determine the expected return if he allocates 20% of his portfolio to risk-free assets.

Mr. Orbiso is an investor and wants to build a portfolio using only U.S. T-bills and an index fund that closely tracks the S&P 500 Index. The T-bills have a return of 4.5%. The S&P 500 has a standard deviation of 15% and an expected return of 12%.

2. Mr. Orbiso wants to determine the expected return if he allocates 50% of his portfolio to risk-free assets.

Mr. Orbiso is an investor and wants to build a portfolio using only U.S. T-bills and an index fund that closely tracks the S&P 500 Index. The T-bills have a return of 4.5%. The S&P 500 has a standard deviation of 15% and an expected return of 12%.

3. Mr. Orbiso wants to determine the estimated portfolio risk if he allocates 40% of his portfolio to risk-free assets.

Mr. Orbiso is an investor and wants to build a portfolio using only U.S. T-bills and an index fund that closely tracks the S&P 500 Index. The T-bills have a return of 4.5%. The S&P 500 has a standard deviation of 15% and an expected return of 12%.

4. Mr. Orbiso wants to determine the estimated portfolio risk if he allocates 65% of his portfolio to risk-free assets.

Mr. Orbiso is an investor and wants to build a portfolio using only U.S. T-bills and an index fund that closely tracks the S&P 500 Index. The T-bills have a return of 4.5%. The S&P 500 has a standard deviation of 15% and an expected return of 12%.

5. Mr. Orbiso wants to determine the expected return if he allocates 80% of his portfolio to risk-free assets.