RT Journal Article SR Electronic T1 What to do, or not do, about the markets JF The Journal of Portfolio Management FD Institutional Investor Journals SP 14 OP 19 DO 10.3905/jpm.1988.409173 VO 14 IS 4 A1 Robert A Ferguson YR 1988 UL https://pm-research.com/content/14/4/14.abstract AB