Stock Market Overreactions to Bad News in Good Times: A Rational Expectations Equilibrium Model
- 1 October 1999
- journal article
- Published by Oxford University Press (OUP) in The Review of Financial Studies
- Vol. 12 (5) , 975-1007
- https://doi.org/10.1093/rfs/12.5.975
Abstract
This article presents a dynamic, rational expectations equilibrium model of asset prices where the drift of fundamentals (dividends) shifts between two unobservable states at random times. I show that in equilibrium, investors' willingness to hedge against changes in their own 'uncertainty' on the true state makes stock prices overreact to bad news in good times and underreact to good news in bad times. I then show that this model is better able than conventional models with no regime shifts to explain features of stock returns, including volatility clustering, 'leverage effects,' excess volatility, and time-varying expected returns.Keywords
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This publication has 20 references indexed in Scilit:
- On estimating the expected return on the market: An exploratory investigationPublished by Elsevier ,2002
- By Force of Habit: A Consumption‐Based Explanation of Aggregate Stock Market BehaviorJournal of Political Economy, 1999
- Fluctuating Confidence in Stock Markets: Implications for Returns and VolatilityJournal of Financial and Quantitative Analysis, 1997
- No news is good newsJournal of Financial Economics, 1992
- Why Does Stock Market Volatility Change Over Time?The Journal of Finance, 1989
- A New Approach to the Economic Analysis of Nonstationary Time Series and the Business CycleEconometrica, 1989
- Expected stock returns and volatilityJournal of Financial Economics, 1987
- Optimal Portfolio Choice Under Incomplete InformationThe Journal of Finance, 1986
- An Intertemporal General Equilibrium Model of Asset PricesEconometrica, 1985
- An Intertemporal Capital Asset Pricing ModelEconometrica, 1973