RT Journal Article SR Electronic T1 Return and Risk Characteristics of Tactical Asset Allocation Under Imperfect Information JF The Journal of Portfolio Management FD Institutional Investor Journals SP 61 OP 70 DO 10.3905/jpm.1998.409661 VO 25 IS 1 A1 Wai Lee YR 1998 UL https://pm-research.com/content/25/1/61.abstract AB