In: Accounting
You find a certain stock that had returns of 14 percent, -27 percent, 19 percent, and 21 percent for four of the last five years, respectively. What is the average return of the stock over this period? What is the standard deviation of the stock's returns?
Answer
1.
Average = {14 + (27) + 19 + 21} / 4
Average = 6.75%
2.
X |
A = X - M |
A^2 |
Let’s assume M = 19 |
||
14 |
(5) |
25 |
(27) |
(46) |
2116 |
19 |
- |
0 |
21 |
2 |
4 |
Total |
2145 |
|
Standard Deviation = Under root of (A^2 / n-1)
= Under root of (2145 / 4-1)
Standard Deviation = 26.74
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