contestada

You hear on the news that the​ S&P 500 was down 1.7% today relative to the​ risk-free rate​ (the market's excess return was negative 1.7 %). You are thinking about your portfolio and your investments in Zynga and Proctor and Gamble.
a. If​ Zynga's beta is 1.4​, what is your best guess as to​Zynga's excess return​ today?
b. If Proctor and​ Gamble's beta is 0.6​, what is your best guess as to​ P&G's excess return​ today?