RT Journal Article SR Electronic T1 High-yield indexes and benchmark portfolios JF The Journal of Portfolio Management FD Institutional Investor Journals SP 77 OP 83 DO 10.3905/jpm.1992.409399 VO 18 IS 2 A1 Martin S. Fridson YR 1992 UL https://pm-research.com/content/18/2/77.abstract AB