Stock B Returns C1Fea9
1. **Problem Statement:** Calculate the average rate of return for Stock B during the period 1994 through 1998.
2. **Data:** Returns for Stock B by year are: 1994: 114.5050%, 1995: 21.80%, 1996: 30.50%, 1997: -7.60%, 1998: 26.30%.
3. **Formula for Average Return:** The average return $\bar{r}$ over $n$ years is given by
$$\bar{r} = \frac{1}{n} \sum_{i=1}^n r_i$$
where $r_i$ is the return in year $i$.
4. **Calculation:**
$$\bar{r} = \frac{114.5050 + 21.80 + 30.50 + (-7.60) + 26.30}{5}$$
$$= \frac{185.505}{5} = 37.101\%$$
5. **Interpretation:** The average annual return for Stock B over the 5-year period is approximately 37.10%.
6. **Next Step (if needed):** To calculate the standard deviation of returns for Stock B, use the formula:
$$\sigma = \sqrt{\frac{1}{n-1} \sum_{i=1}^n (r_i - \bar{r})^2}$$
7. **Standard Deviation Calculation:**
Calculate each squared deviation:
- $(114.5050 - 37.101)^2 = 5993.02$
- $(21.80 - 37.101)^2 = 234.99$
- $(30.50 - 37.101)^2 = 43.23$
- $(-7.60 - 37.101)^2 = 2010.44$
- $(26.30 - 37.101)^2 = 116.04$
Sum of squared deviations:
$$5993.02 + 234.99 + 43.23 + 2010.44 + 116.04 = 8397.72$$
Divide by $n-1=4$:
$$\frac{8397.72}{4} = 2099.43$$
Standard deviation:
$$\sigma = \sqrt{2099.43} \approx 45.82\%$$
8. **Final Answer:**
- Average return for Stock B (1994-1998): **37.10%**
- Standard deviation of returns for Stock B: **45.82%**
This high standard deviation indicates that Stock B's returns were quite volatile during this period.