RT Journal Article SR Electronic T1 Non–parallel yield curve shifts and spread leverage JF The Journal of Portfolio Management FD Institutional Investor Journals SP 82 OP 87 DO 10.3905/jpm.1991.409333 VO 17 IS 3 A1 Robert R. Reitano YR 1991 UL https://pm-research.com/content/17/3/82.abstract AB