A portfolio is invested 40 percent in stock A, 30 percent in stock B, and 30 percent in stock C. What is the expected return and standard deviation of this portfolio?
State of Probability of Rate of Return if State Occurs
Economy State of Economy Stock A Stock B Stock C
Boom .10 .05 .16 .23
Normal .70 .08 .09 .11
Recession .20 .15 -.03 -.25