RT Journal Article SR Electronic T1 The impact of Mayday on diversification costs JF The Journal of Portfolio Management FD Institutional Investor Journals SP 28 OP 36 DO 10.3905/jpm.1980.408765 VO 6 IS 4 A1 John C. Schveineir A1 Keith V. Smith YR 1980 UL https://pm-research.com/content/6/4/28.abstract AB