You hear on the news that the​ S&P 500 was down 2.3 %2.3% today relative to the​ risk-free rate​ (the market's excess return was negative 2.3 % ).−2.3%). You are thinking about your portfolio and your investments in Zynga and Proctor and Gamble.


a. If​ Zynga's beta is 1.21.2​, what is your best guess as to​ Zynga's excess return​ today?


b. If Proctor and​ Gamble's beta is 0.50.5​, what is your best guess as to​ P&G's excess return​ today?