MC algo 11-40 Portfolio Standard Deviation You decide to invest in a portfolio consisting of 18 percent Stock X, 39 percent Stock Y, and the remainder in Stock Z. Based on the following information, what is the standard deviation of your portfolio? State of Economy Probability of State of Economy Return if State Occurs Stock X Stock Y Stock Z 9.30% 2.70% 11.70% 16.60% 24.60% 16.10% Normal .74 Boom .26 7.51% 6.44% 2.65% 5.15% 1.99%