while Stock B declines by 15%. In the good state, Stock A increases by 15% while Stock B increases by 20%. What is the expected return on stock A and B, respectively? What is the standard deviation of only stock B ? less than 2.3% 3.5%4.25%5.8% more than 15% while Stock B declines by 15%. In the good state, Stock A increases by 15% while Stock B increases by 20%. What is the expected return on stock A and B, respectively? What is the standard deviation of only stock B ? less than 2.3% 3.5%4.25%5.8% more than 15%