RT Journal Article SR Electronic T1 Convexity and exceptional return JF The Journal of Portfolio Management FD Institutional Investor Journals SP 43 OP 47 DO 10.3905/jpm.1990.409263 VO 16 IS 2 A1 Kahn, Ronald N. A1 Lochoff, Roland W YR 1990 UL http://jpm.pm-research.com/content/16/2/43.abstract AB