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Complementarities in Information Acquisition with Short-Term Trades

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Author Info
Christophe Chamley () (Institute for Economic Development, Boston University)
Abstract

In a financial market where agents trade for prices in the short-term and where news can increase the uncertainty of the public belief, there are strategic complementarities in the acquisition of private information and a continuum of equilibrium strategies if the cost of information is sufficient small. Imperfect observation of the past prices reduces the continuum of Nash-equilibrium to a unique one which may be a Strongly Rational-Expectations Equilibrium. In that equilibrium, because of the strategic complementarity, there are two sharply different regimes for the evolution of the price, the volume of trade and the information acquisition which is either nil or at its maximum.

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Publisher Info
Paper provided by Boston University - Department of Economics in its series Boston University - Department of Economics - The Institute for Economic Development Working Papers Series with number dp-156.

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Length: 37 pages
Date of creation: Jul 2005
Date of revision:
Handle: RePEc:bos:iedwpr:dp-156

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Related research
Keywords: financial markets; short-term; endogenous information; multiple equilibria; social learning; trading frenzies.;

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  1. Vives, Xavier, 1995. "Short-Term Investment and the Informational Efficiency of the Market," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 8(1), pages 125-60. [Downloadable!] (restricted)
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  2. Grossman, Sanford J & Stiglitz, Joseph E, 1976. "Information and Competitive Price Systems," American Economic Review, American Economic Association, vol. 66(2), pages 246-53, May.
  3. Bikhchandani, Sushil & Hirshleifer, David & Welch, Ivo, 1992. "A Theory of Fads, Fashion, Custom, and Cultural Change in Informational Cascades," Journal of Political Economy, University of Chicago Press, vol. 100(5), pages 992-1026, October. [Downloadable!] (restricted)
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  6. Carlsson, Hans & van Damme, Eric, 1993. "Global Games and Equilibrium Selection," Econometrica, Econometric Society, vol. 61(5), pages 989-1018, September. [Downloadable!] (restricted)
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  7. Maria Grazia Romano, 2004. "Learning, Cascades and Transaction Costs," CSEF Working Papers 123, Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy. [Downloadable!]
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  8. Gadi Barlevy & Pietro Veronesi, . "Information Acquisition in Financial Markets," CRSP working papers 484, Center for Research in Security Prices, Graduate School of Business, University of Chicago.
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  9. Veronesi, Pietro, 1999. "Stock Market Overreaction to Bad News in Good Times: A Rational Expectations Equilibrium Model," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 12(5), pages 975-1007.
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  11. Hirshleifer, David & Teoh, Siew Hong, 2001. "Herd Behavior and Cascading in Capital Markets: A Review and Synthesis," MPRA Paper 5186, University Library of Munich, Germany. [Downloadable!]
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  12. Grossman, Sanford J & Stiglitz, Joseph E, 1980. "On the Impossibility of Informationally Efficient Markets," American Economic Review, American Economic Association, vol. 70(3), pages 393-408, June.
  13. R. Guesnerie, 2002. "Anchoring Economic Predictions in Common Knowledge," Econometrica, Econometric Society, vol. 70(2), pages 439-480, March. [Downloadable!] (restricted)
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  14. Cooper, Russell & John, Andrew, 1988. "Coordinating Coordination Failures in Keynesian Models," The Quarterly Journal of Economics, MIT Press, vol. 103(3), pages 441-63, August. [Downloadable!] (restricted)
  15. Detemple, Jerome B., 1991. "Further results on asset pricing with incomplete information," Journal of Economic Dynamics and Control, Elsevier, vol. 15(3), pages 425-453, July. [Downloadable!] (restricted)
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