Oxxo corporation’s stock returns for years 1 – 4 were (20.00%), 15.00%, 10.00% and 20.00%. Given this information, calculate the standard deviation of the returns.
Ans 15.56
YEAR | RETURN | (X -Average Return of X)^2 |
1 | -20 | 689.062500 |
2 | 15 | 76.562500 |
3 | 10 | 14.062500 |
4 | 20 | 189.062500 |
Total | 25 | 968.750000 |
Arithmetic Average = | Total Return / NO of years | |
25 / 4 | ||
6.25 | ||
Variance = | sum of (X -Average Return of X)^2 / no of years | |
968.75 / 4 | ||
242.1875 | ||
Standard Deviation = | Square root of Variance | |
Square root of 242.1875 | ||
15.56 |
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