RT Journal Article SR Electronic T1 The complexity of the stock market JF The Journal of Portfolio Management FD Institutional Investor Journals SP 19 OP 27 DO 10.3905/jpm.1989.409244 VO 16 IS 1 A1 Bruce I. Jacobs A1 Kenneth N. Levy YR 1989 UL https://pm-research.com/content/16/1/19.abstract AB