RT Journal Article SR Electronic T1 Simplifying portfolio insurance JF The Journal of Portfolio Management FD Institutional Investor Journals SP 48 OP 51 DO 10.3905/jpm.1987.409131 VO 14 IS 1 A1 Fischer Black A1 Robert W Jones YR 1987 UL https://pm-research.com/content/14/1/48.abstract AB