Problem:
A stock has a beta of 1.2 and an expected return of 9 percent. A risk-free asset currently earns 4 percent.
a. What is the expected return on a portfolio that is equally invested in the two assets?
b. If a portfolio of the two assets has a beta of 1.1, what are the portfolio weights?
c. If a portfolio of the two assets has an expected return of 8 percent, what is its Beta?
d. If a portfolio of the two assets has a beta of 2.40 what ate the portfolio weights?