PT - JOURNAL ARTICLE AU - Robert B Litterman AU - Josè Scheinkman TI - Common Factors Affecting Bond Returns AID - 10.3905/jfi.1991.692347 DP - 1991 Jun 30 TA - The Journal of Fixed Income PG - 54--61 VI - 1 IP - 1 4099 - https://pm-research.com/content/1/1/54.short 4100 - https://pm-research.com/content/1/1/54.full