RT Journal Article SR Electronic T1 The Nature and Significance of Trend Betas JF The Journal of Portfolio Management FD Institutional Investor Journals SP 36 OP 40 DO 10.3905/jpm.1978.408644 VO 4 IS 3 A1 Johnson, James M. A1 Baesel, Jerome B. YR 1978 UL http://jpm.pm-research.com/content/4/3/36.abstract AB