Returns Probability distribution IBM Dell Recession 0% -10% 10% Normal 10% 10% 50% Economic boom 20% 30% 40% What are the Variance and Standard Deviation of IBM? Returns Probability distribution IBM Dell Recession 0% -10% 10% Normal 10% 10% 50% Economic boom 20% 30% 40% What is the covariance between the returns of IBM and Dell