RT Journal Article SR Electronic T1 Understanding option-adjusted spreads and their use JF The Journal of Portfolio Management FD Institutional Investor Journals SP 68 OP 69 DO 10.3905/jpm.1990.409285 VO 16 IS 4 A1 Lakhbir S. Hayre YR 1990 UL https://pm-research.com/content/16/4/68.abstract AB