RT Journal Article SR Electronic T1 Are Trading Rule Profits Feasible? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 77 OP 78 DO 10.3905/jpm.14.1.49 VO 14 IS 1 A1 Yakov Amihud A1 Haim Mendelson YR 1987 UL https://pm-research.com/content/14/1/77.abstract AB