RT Journal Article SR Electronic T1 Why a weekend effect? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 88 OP 89 DO 10.3905/jpm.1990.409286 VO 16 IS 4 A1 Edward A. Dyl A1 Clyde W. Holland YR 1990 UL https://pm-research.com/content/16/4/88.abstract AB