RT Journal Article SR Electronic T1 Investment Objectives, Policy and Risk JF The Journal of Portfolio Management FD Institutional Investor Journals SP 29 OP 33 DO 10.3905/jpm.1975.408544 VO 1 IS 4 A1 John W. O'Brien YR 1975 UL https://pm-research.com/content/1/4/29.abstract AB