%0 Journal Article %A George M. Frankfurter %A Herbert E. Phillips %T Alpha-Beta Theory %B A Word of Caution %D 1977 %R 10.3905/jpm.1977.408607 %J The Journal of Portfolio Management %P 35-40 %V 3 %N 4 %U https://jpm.pm-research.com/content/iijpormgmt/3/4/35.full.pdf