RT Journal Article SR Electronic T1 How to Beat the S&P 500 Index Using Credit Analysis Alone JF The Journal of Portfolio Management FD Institutional Investor Journals SP 25 OP 31 DO 10.3905/jpm.1993.409437 VO 19 IS 2 A1 C. Ross Healy A1 Enrico Sgromo YR 1993 UL https://pm-research.com/content/19/2/25.abstract AB