Learning about Risk and Return: A Simple Model of Bubbles and Crashes
This paper demonstrates that an asset pricing model with least-squares learning can lead to bubbles and crashes as endogenous responses to the fundamentals driving asset prices. When agents are risk-averse they need to make forecasts of the conditional variance of a stock’s return. Recursive updating of both the conditional variance and the expected return implies several mechanisms through which learning impacts stock prices. Extended periods of excess volatility, bubbles and crashes arise with a frequency that depends on the extent to which past data is discounted. A central role is played by changes over time in agents’ estimates of risk.
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- Kenneth D. West, 1986.
"A Specification Test for Speculative Bubbles,"
NBER Working Papers
2067, National Bureau of Economic Research, Inc.
- Kenneth A. Froot & Maurice Obstfeld, 1989.
"Intrinsic Bubbles: The Case of Stock Prices,"
NBER Working Papers
3091, National Bureau of Economic Research, Inc.
- Bruce McGough, 2003.
Computing in Economics and Finance 2003
294, Society for Computational Economics.
- Cho, In-Koo & Kasa, Kenneth, 2008.
"Learning Dynamics And Endogenous Currency Crises,"
Cambridge University Press, vol. 12(02), pages 257-285, April.
- Thomas J. Sargent & Noah Williams & Tao Zha, 2006.
"The conquest of South American inflation,"
FRB Atlanta Working Paper
2006-20, Federal Reserve Bank of Atlanta.
- Blanchard, Olivier Jean, 1979. "Speculative bubbles, crashes and rational expectations," Economics Letters, Elsevier, vol. 3(4), pages 387-389.
- GRANDMONT, Jean-Michel, 1997.
"Expectations formation and stability of large socioeconomic systems,"
CORE Discussion Papers
1997088, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
- Jean-Michel Grandmont, 1998. "Expectations Formation and Stability of Large Socioeconomic Systems," Econometrica, Econometric Society, vol. 66(4), pages 741-782, July.
- Grandmont, Jean-Michel, 1994. "Expectations formation and stability of large socioeconomic systems," CEPREMAP Working Papers (Couverture Orange) 9424, CEPREMAP.
- Jean-Michel Grandmont, 1997. "Expectations Formation and Stability of Large Socioeconomic Systems," Working Papers 97-27, Centre de Recherche en Economie et Statistique.
- George W. Evans & Seppo Honkapohja, .
"Economic Dynamics with Learning: New Stability Results,"
Computing in Economics and Finance 1997
51, Society for Computational Economics.
- George W. Evans & Seppo Honkapohja, 1998. "Economic Dynamics with Learning: New Stability Results," Review of Economic Studies, Oxford University Press, vol. 65(1), pages 23-44.
- Albert Marcet & Juan P. Nicolini, 1995.
"Recurrent hyperinflations and learning,"
Economics Working Papers
244, Department of Economics and Business, Universitat Pompeu Fabra, revised Nov 2001.
- Volker Böhm & Carl Chiarella, 2005.
"Mean Variance Preferences, Expectations Formation, And The Dynamics Of Random Asset Prices,"
Wiley Blackwell, vol. 15(1), pages 61-97.
- Volker Bohm & Carl Chiarella, 2000. "Mean Variance Preferences, Expectations Formation, and the Dynamics of Random Asset Prices," Research Paper Series 46, Quantitative Finance Research Centre, University of Technology, Sydney.
- Timmermann, Allan, 1994. "Can Agents Learn to Form Rational Expectations? Some Results on Convergence and Stability of Learning in the UK Stock Market," Economic Journal, Royal Economic Society, vol. 104(425), pages 777-97, July.
- Eva Carceles Poveda & Chryssi Giannitsarou, 2006.
"Asset pricing with adaptive learning,"
Computing in Economics and Finance 2006
25, Society for Computational Economics.
- Jonathan Lewellen & Jay Shanken, 2002. "Learning, Asset-Pricing Tests, and Market Efficiency," Journal of Finance, American Finance Association, vol. 57(3), pages 1113-1145, 06.
- Hong, Harrison & Scheinkman, José & Xiong, Wei, 2008.
"Advisors and asset prices: A model of the origins of bubbles,"
Journal of Financial Economics,
Elsevier, vol. 89(2), pages 268-287, August.
- Harrison Hong & Jose A. Scheinkman & Wei Xiong, 2007. "Advisors and Asset Prices: A Model of the Origins of Bubbles," NBER Working Papers 13504, National Bureau of Economic Research, Inc.
- Harrison Hong & Jose Scheinkman & Wei Xiong, 2005. "Advisors and Asset Prices: A Model of the Origins of Bubbles," Levine's Bibliography 122247000000001003, UCLA Department of Economics.
- Eva Carceles-Poveda & Chryssi Giannitsarou, 2007.
"Online Appendix to Asset Pricing with Adaptive Learning,"
carceles08, Review of Economic Dynamics.
- J. Bradford De Long & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, .
"Noise Trader Risk in Financial Markets,"
J. Bradford De Long's Working Papers
_124, University of California at Berkeley, Economics Department.
- Robert C. Merton, 1980.
"On Estimating the Expected Return on the Market: An Exploratory Investigation,"
NBER Working Papers
0444, National Bureau of Economic Research, Inc.
- Merton, Robert C., 1980. "On estimating the expected return on the market : An exploratory investigation," Journal of Financial Economics, Elsevier, vol. 8(4), pages 323-361, December.
- Evans, George W, 1991. "Pitfalls in Testing for Explosive Bubbles in Asset Prices," American Economic Review, American Economic Association, vol. 81(4), pages 922-30, September.
- Geweke, John, 2001. "A note on some limitations of CRRA utility," Economics Letters, Elsevier, vol. 71(3), pages 341-345, June.
- Manuel S. Santos & Michael Woodford, 1993.
"Rational Asset Pricing Bubbles,"
9304, Centro de Investigacion Economica, ITAM.
- Harrison Hong & Jose Scheinkman & Wei Xiong, 2005.
"Asset Float and Speculative Bubbles,"
122247000000000861, UCLA Department of Economics.
- Branch, William A. & Evans, George W., 2006.
"A simple recursive forecasting model,"
Elsevier, vol. 91(2), pages 158-166, May.
- Wiliam Branch & George W. Evans, 2005. "A Simple Recursive Forecasting Model," University of Oregon Economics Department Working Papers 2005-3, University of Oregon Economics Department, revised 01 Feb 2005.
- Martin L. Weitzman, 2007. "Subjective Expectations and Asset-Return Puzzles," American Economic Review, American Economic Association, vol. 97(4), pages 1102-1130, September.
- Cho, In-Koo & Sargent, Thomas J., 2000.
"Escaping Nash inflation,"
Working Paper Series
0023, European Central Bank.
- Allan Timmermann, 1996. "Excess Volatility and Predictability of Stock Prices in Autoregressive Dividend Models with Learning," Review of Economic Studies, Oxford University Press, vol. 63(4), pages 523-557.
- Allen F. & Morris S. & Postlewaite A., 1993. "Finite Bubbles with Short Sale Constraints and Asymmetric Information," Journal of Economic Theory, Elsevier, vol. 61(2), pages 206-229, December.
- Eli Ofek & Matthew Richardson, 2003. "DotCom Mania: The Rise and Fall of Internet Stock Prices," Journal of Finance, American Finance Association, vol. 58(3), pages 1113-1138, 06.
- Marcet, Albert & Sargent, Thomas J., 1989. "Convergence of least squares learning mechanisms in self-referential linear stochastic models," Journal of Economic Theory, Elsevier, vol. 48(2), pages 337-368, August.
- Klaus Adam & Albert Marcet & Juan Pablo Nicolini, 2006. "Learning and Stock Market Volatility," Computing in Economics and Finance 2006 15, Society for Computational Economics.
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