RT Journal Article SR Electronic T1 Ten Myths and Twenty Years of Betas JF The Journal of Portfolio Management FD Institutional Investor Journals SP 79 OP 82 DO 10.3905/jpm.1994.409497 VO 21 IS 1 A1 Wayne H. Wagner YR 1994 UL https://pm-research.com/content/21/1/79.abstract AB