RT Journal Article SR Electronic T1 A Closed-Form Formula for Calculating Bond Convexity JF The Journal of Fixed Income FD Institutional Investor Journals SP 88 OP 91 DO 10.3905/jfi.1996.408163 VO 6 IS 1 A1 David Blake A1 J. Michael Orszag YR 1996 UL https://pm-research.com/content/6/1/88.abstract AB