RT Journal Article SR Electronic T1 Comments on Schwert's Review of Market Volatility JF The Journal of Portfolio Management FD Institutional Investor Journals SP 97 OP 98 DO 10.3905/jpm.1992.409425 VO 19 IS 1 A1 Peter S. Spiro YR 1992 UL https://pm-research.com/content/19/1/97.abstract AB