RT Journal Article SR Electronic T1 Does the Composition of the Market Portfolio Really Matter? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 26 OP 32 DO 10.3905/jpm.1987.26 VO 13 IS 2 A1 Keith C. Brown A1 Gregory D. Brown YR 1987 UL https://pm-research.com/content/13/2/26.abstract AB