RT Journal Article SR Electronic T1 Are There Really Trends in Foreign Exchange Returns? JF The Journal of Investing FD Institutional Investor Journals SP 33 OP 40 DO 10.3905/joi.2.2.33 VO 2 IS 2 A1 Eric J. Weigel YR 1993 UL https://pm-research.com/content/2/2/33.abstract AB