RT Journal Article SR Electronic T1 Use of the mean reversion model in the predicting stock market volatility JF The Journal of Portfolio Management FD Institutional Investor Journals SP 22 OP 26 DO 10.3905/jpm.1991.409338 VO 17 IS 3 A1 William Lewis Randolph YR 1991 UL https://pm-research.com/content/17/3/22.abstract AB