RT Journal Article SR Electronic T1 Spread duration JF The Journal of Portfolio Management FD Institutional Investor Journals SP 46 OP 53 DO 10.3905/jpm.1990.409272 VO 16 IS 3 A1 Martin L. Leibowitz A1 William S. Krasker A1 Ardavan Nozari YR 1990 UL https://pm-research.com/content/16/3/46.abstract AB