RT Journal Article SR Electronic T1 Arbitrage–free spread JF The Journal of Portfolio Management FD Institutional Investor Journals SP 78 OP 79 DO 10.3905/jpm.1991.409330 VO 17 IS 3 A1 Lakhbir S. Hayre YR 1991 UL https://pm-research.com/content/17/3/78.abstract AB