You own three stocks: 1000 shares of Apple Computer, 10,000 shares of Cisco Systems, and 5000 shares of Goldman Sachs Group. The current share prices and expected returns of Apple, Cisco, and Goldman are, respectively, $125, $19, $120 and 12%, 10%, 10.5%.

a.    What are the portfolio weights of the three stocks in your portfolio?

b.    What is the expected return of your portfolio?

c.    Suppose that both Apple and Cisco go up by $5 and Goldman goes down by $10. What are the new portfolio weights?

d.    Assuming the stocks' expected returns remain the similar, what is the expected return of the portfolio at the new prices?