Suppose there is an investor with a very high risk tolerance. She could invest 100% of her wealth in a stock fund with s = 17% and E(r ) = 15%, or she could borrow, and invest in the Optimal Risky Portfolio which has s = 12% and E(r ) = 12%. Leverage would give her a higher E(r ) but with the same standard deviation as the stock fund (17%), if she can get a good borrowing rate.
a. Assuming she can borrow at the T-Bill (risk-free) rate of 2%, calculate the weights for the investor to create her Complete Portfolio.
b. Calculate the Expected Return for this Complete Portfolio.
c. Calculate the maximum interest rate at which the investor would be willing to borrow before she decided to just invest 100% in the Stock fund (assuming the same weights as you calculated in Part a). In other words, calculate the breakeven borrowing rate. Show your work. If you use Solver in Excel, provide a screenshot and explain your setup.