In: Finance
Suppose that your friend has decided to construct a portfolio that will contain stocks X and Y. The standard deviations of stock X and stock Y are 12% and 16% respectively, and the correlation between stock X and stock Y is 0.6. Your friend has decided to put 40% of his money on stock X and the rest on stock Y. What is the standard deviation of his portfolio?
a. 8.59%
b. 9.03%
c. 10.88%
d. 13.06%
Answer: D
can someone explain how? in steps