PT - JOURNAL ARTICLE AU - Eric H. Sorensen TI - Bond ratings versus market risk premiums AID - 10.3905/jpm.1980.408743 DP - 1980 Apr 30 TA - The Journal of Portfolio Management PG - 64--69 VI - 6 IP - 3 4099 - https://pm-research.com/content/6/3/64.short 4100 - https://pm-research.com/content/6/3/64.full