Look back to the top-right panel of Figure 9.2 . What proportion of Amazons returns was explained by market movements? What proportion of risk was diversifiable? How does the diversifiable risk show up in the plot? What is the range of possible errors in the estimated beta?

Amazon run, % -2218 Atim, % -2156 R 272 20 R-297 10 Market ntun % Market return, % 30 20 -10 20 30 30 20 -10 10 20 30 January 1999- Decombor 2003 January 2004- Decombor 2008 Disney return % Disnay otun % -.957 R2-298 R2-395 1Q Market Rturn, % January 1999- Decombor 2003 Campbell Soup 20 return, % return % -.426 -Markot return, % return, % 10 20 30