Adaptive Expectations and Stock Market Crashes
A theory is developed that explains how stocks can crash without fundamental news and why crashes are more common than frenzies. A crash occurs via the interaction of rational and naive investors. Naive traders believe that prices follow a random walk with serially correlated volatility. Their expectations of future volatility are formed adaptively. When the market crashes, naive traders sell stock in response to the apparent increase in volatility. Since rational traders are risk averse as well, a lower price is needed to clear the market: the crash is a self-fulfilling prophecy. Frenzies cannot occur in this model.
|Date of creation:||01 May 2008|
|Date of revision:|
|Publication status:||Published in International Economic Review, May 2008, vol. 49 no. 2, pp. 595-619|
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- Chou, Ray Yeutien, 1988. "Volatility Persistence and Stock Valuations: Some Empirical Evidence Using Garch," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 3(4), pages 279-94, October-D.
- Dilip Abreu & Markus K. Brunnermeier, 2003.
"Bubbles and Crashes,"
Econometric Society, vol. 71(1), pages 173-204, January.
- Gadi Barlevy & Pietro Veronesi, 2000.
"Rational Panics and Stock Market Crashes,"
CRSP working papers
483, Center for Research in Security Prices, Graduate School of Business, University of Chicago.
- Pindyck, Robert S, 1984.
"Risk, Inflation, and the Stock Market,"
American Economic Review,
American Economic Association, vol. 74(3), pages 335-51, June.
- Bollerslev, Tim, 1986.
"Generalized autoregressive conditional heteroskedasticity,"
Journal of Econometrics,
Elsevier, vol. 31(3), pages 307-327, April.
- Tim Bollerslev, 1986. "Generalized autoregressive conditional heteroskedasticity," EERI Research Paper Series EERI RP 1986/01, Economics and Econometrics Research Institute (EERI), Brussels.
- Robert J. Shiller, 1998.
"Human Behavior and the Efficiency of the Financial System,"
Cowles Foundation Discussion Papers
1172, Cowles Foundation for Research in Economics, Yale University.
- Shiller, Robert J., 1999. "Human behavior and the efficiency of the financial system," Handbook of Macroeconomics, in: J. B. Taylor & M. Woodford (ed.), Handbook of Macroeconomics, edition 1, volume 1, chapter 20, pages 1305-1340 Elsevier.
- Robert J. Shiller, 1998. "Human Behavior and the Efficiency of the Financial System," NBER Working Papers 6375, National Bureau of Economic Research, Inc.
- Harrison Hong & Jeremy C. Stein, 2003. "Differences of Opinion, Short-Sales Constraints, and Market Crashes," Review of Financial Studies, Society for Financial Studies, vol. 16(2), pages 487-525.
- Caplin, Andrew & Leahy, John, 1994.
"Business as Usual, Market Crashes, and Wisdom after the Fact,"
American Economic Review,
American Economic Association, vol. 84(3), pages 548-65, June.
- Caplin, A. & Leahy, J., 1992. "Business as Usual, Market Crashes, and Wisdom after the Fact," Harvard Institute of Economic Research Working Papers 1594, Harvard - Institute of Economic Research.
- Jackwerth, Jens Carsten & Rubinstein, Mark, 1996. " Recovering Probability Distributions from Option Prices," Journal of Finance, American Finance Association, vol. 51(5), pages 1611-32, December.
- David M. Grether, 1980. "Bayes Rule as a Descriptive Model: The Representativeness Heuristic," The Quarterly Journal of Economics, Oxford University Press, vol. 95(3), pages 537-557.
- French, Kenneth R. & Schwert, G. William & Stambaugh, Robert F., 1987. "Expected stock returns and volatility," Journal of Financial Economics, Elsevier, vol. 19(1), pages 3-29, September.
- Benoit Mandelbrot, 1963. "The Variation of Certain Speculative Prices," The Journal of Business, University of Chicago Press, vol. 36, pages 394.
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