You choose to construct a portfolio from the Stock A, Stock…

You choose to construct a portfolio from the Stock A, Stock B, and the risk-free investment. You make the following estimates of the three: Estimates of Alpha, Beta, and Firm-Specific Risk   Alpha Beta Firm-Specific Std Dev Stock A 1.00% 1.25 60.00% Stock B 0.75% 0.80 40.00% Risk-Free Investment 0.00% 0.00 0.00% You invest 45% of your portfolio in Stock A, 45% in Stock B, and the remaining 10% in the risk-free investment. What is your portfolio’s firm-specific risk (standard deviation)?