RT Journal Article SR Electronic T1 The use of futures in immunized portfolios JF The Journal of Portfolio Management FD Institutional Investor Journals SP 51 OP 58 DO 10.3905/jpm.1985.409000 VO 11 IS 2 A1 Jess B. Yawitz A1 William J. Marshall YR 1985 UL https://pm-research.com/content/11/2/51.abstract AB