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Stock Market Volatility and Learning

  • Adam, Klaus
  • Marcet, Albert
  • Nicolini, Juan Pablo

We study a standard consumption based asset pricing model with rational investors who entertain subjective prior beliefs about price behavior. Optimal behavior then dictates that investors learn about price behavior from past price observations. We show that this imparts momentum and mean reversion into the equilibrium behavior of the price dividend ratio, similar to what can be observed in the data. Estimating the model on U.S. stock price data using the method of simulated moments, we show that it can quantitatively account for the observed stock price volatility, the persistence of the price-dividend ratio, and the predictability of long-horizon returns. For reasonable degrees of risk aversion, the model also passes a formal statistical test for the overall goodness of fit, provided one excludes the equity premium from the set of moments to be matched.

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Paper provided by University of Mannheim, Department of Economics in its series Working Papers with number 12-06.

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Date of creation: 2012
Date of revision:
Handle: RePEc:mnh:wpaper:31217
Contact details of provider: Postal: 68131 Mannheim
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  7. Klaus Adam & Albert Marcet & Juan Pablo Nicolini, 2015. "Stock Market Volatility and Learning," Working Papers 336, Barcelona Graduate School of Economics.
  8. John Y. Campbell & John H. Cochrane, 1994. "By force of habit: a consumption-based explanation of aggregate stock market behavior," Working Papers 94-17, Federal Reserve Bank of Philadelphia.
  9. Andrew B. Abel, . "Asset Prices Under Habit Formation and Catching Up With the Jones," Rodney L. White Center for Financial Research Working Papers 1-90, Wharton School Rodney L. White Center for Financial Research.
  10. Klaus Adam, 2003. "Learning and Equilibrium Selection in a Monetary Overlapping Generations Model with Sticky Prices," Review of Economic Studies, Oxford University Press, vol. 70(4), pages 887-907.
  11. Wiliam Branch & George W. Evans, . "Asset Return Dynamics and Learning," University of Oregon Economics Department Working Papers 2006-14, University of Oregon Economics Department.
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  25. Timmermann, Allan G, 1993. "How Learning in Financial Markets Generates Excess Volatility and Predictability in Stock Prices," The Quarterly Journal of Economics, MIT Press, vol. 108(4), pages 1135-45, November.
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  27. Voth, Hans-Joachim, 2002. "With a Bang, Not a Whimper: Pricking Germany's 'Stock Market Bubble' in 1927 and the Slide into Depression," CEPR Discussion Papers 3257, C.E.P.R. Discussion Papers.
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  29. Klaus Adam, 2001. "Learning and Equilibrium Selection in a Monetary Overlapping Generations Model with Sticky," CSEF Working Papers 69, Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy.
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