What method should I use to solve this problem?
If I currently hold the S&P 500, should I add either A or B to my portfolio? Why?
RoR Beta SD
Portfolio A 12.00% 0.7 12.00%
Portfolio B 16.00% 1.4 31.00%
T-Bills 5.00%
S&P 500 13.00% 18.00%