RT Journal Article SR Electronic T1 How to Anticipate Utility Bond Rating Changes JF The Journal of Portfolio Management FD Institutional Investor Journals SP 56 OP 60 DO 10.3905/jpm.1980.408774 VO 7 IS 1 A1 Lloyd McAdams YR 1980 UL https://pm-research.com/content/7/1/56.abstract AB