A certain bond experienced total returns of 13.75 percent, -11.375 percent, -4.89 percent, 10.22 percent, 3.658 percent, and 11.17 over the past five years. What is the standard deviation of these returns? A Treasury Bond has annual returns of 9.22 percent, 15.64 percent, -12.42 percent, and 6.45 and -7.51 percent for the past five years. The arithmetic average of these returns is percent. percent while the geometric average return for the period is