The following are the monthly rates of return for Madison Cookies and for Sophie Electric during a six month period.
Month Madison Cookies Sophie Electric
1 -0.04 0.07
2 0.06 -0.02
3 -0.07 -0.10
4 0.12 0.15
5 -0.02 -0.06
6 0.05 0.02
Compute the following.
A) Average monthly rate of return Ri for each stock
B) Standard deviation of returns for each stock
C) Covariance between the rates of return
D) The correlation coefficient between the rates of return