RT Journal Article SR Electronic T1 Catch 500 JF The Journal of Portfolio Management FD Institutional Investor Journals SP 80 OP 81 DO 10.3905/jpm.1980.408772 VO 7 IS 1 A1 George E. Frankfurter A1 Herbert M. Phillips YR 1980 UL https://pm-research.com/content/7/1/80.abstract AB