Anderson stock had returns of 6%, -22%, 18%, 12%, and -2% over the past five years. What is the standard deviation of Anderson's returns? A. 11.68 percent B. 10.21 percent C. 18.74 percent D. 13.49 percent E. 15.52 percent
Answer is 15.52%
Returns over the past 5 years are 6%, -22%, 18%, 12% and -2%
Expected Return = [0.06 + (-0.22) + 0.18 + 0.12 + (-0.02)] /
5
Expected Return = 0.12 / 5
Expected Return = 0.024 or 2.40%
Variance = [(0.06 - 0.024)^2 + (-0.22 - 0.024)^2 + (0.18 -
0.024)^2 + (0.12 - 0.024)^2 + (-0.02 - 0.024)^2] / 4
Variance = 0.09632 / 4
Variance = 0.02408
Standard Deviation = (0.02408)^(1/2)
Standard Deviation = 0.1552 or 15.52%
So, standard deviation of Anderson's returns is 15.52%
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