TY - JOUR T1 - The concealed factors JF - The Journal of Portfolio Management SP - 4 DO - 10.3905/jpm.1980.408753 VL - 6 IS - 3 AU - Peter L. Bernstein Y1 - 1980/04/30 UR - https://pm-research.com/content/6/3/4.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -