%0 Journal Article %A Marshall E. Blume %T The use of “alphas” to improve performance %D 1984 %R 10.3905/jpm.1984.408977 %J The Journal of Portfolio Management %P 86-92 %V 11 %N 1 %U https://jpm.pm-research.com/content/iijpormgmt/11/1/86.full.pdf