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Market Selection

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  • Leonid Kogan
  • Stephen Ross
  • Jiang Wang
  • Mark M. Westerfield

Abstract

The hypothesis that financial markets punish traders who make relatively inaccurate forecasts and eventually eliminate the effect of their beliefs on prices is of fundamental importance to the standard modeling paradigm in asset pricing. We establish necessary and sufficient conditions for agents making inferior forecasts to survive and to affect prices in the long run in a general setting with minimal restrictions on endowments, beliefs, or utility functions. We show that the market selection hypothesis is valid for economies with bounded endowments or bounded relative risk aversion, but it cannot be substantially generalized to a broader class of models. Instead, survival is determined by a comparison of the forecast errors to risk attitudes. The price impact of inaccurate forecasts is distinct from survival because price impact is determined by the volatility of traders’ consumption shares rather than by their level. Our results also apply to economies with state-dependent preferences, such as habit formation.

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Bibliographic Info

Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 15189.

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Date of creation: Jul 2009
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Handle: RePEc:nbr:nberwo:15189

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  1. Leonid Kogan & Stephen A. Ross & Jiang Wang & Mark M. Westerfield, 2006. "The Price Impact and Survival of Irrational Traders," Journal of Finance, American Finance Association, vol. 61(1), pages 195-229, 02.
  2. J. Bradford De Long & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, 1988. "The Survival of Noise Traders in Financial Markets," NBER Working Papers 2715, National Bureau of Economic Research, Inc.
  3. Alvaro Sandroni, 2000. "Do Markets Favor Agents Able to Make Accurate Predicitions?," Econometrica, Econometric Society, vol. 68(6), pages 1303-1342, November.
  4. A. Abel, 2010. "Asset prices under habit formation and catching up with the Jones," Levine's Working Paper Archive 1395, David K. Levine.
  5. Larry Blume & David Easley, 2001. "If You're So Smart, Why Aren't You Rich? Belief Selection in Complete and Incomplete Markets," Cowles Foundation Discussion Papers 1319, Cowles Foundation for Research in Economics, Yale University.
  6. Hongjun Yan, 2008. "Natural Selection in Financial Markets: Does It Work?," Management Science, INFORMS, vol. 54(11), pages 1935-1950, November.
  7. Wei Xiong & Hongjun Yan & Review Financial, 2007. "Heterogeneous Expectations and Bond Markets," Yale School of Management Working Papers amz2614, Yale School of Management, revised 01 Jun 2009.
  8. Blume, Lawrence & Easley, David, 1992. "Evolution and market behavior," Journal of Economic Theory, Elsevier, vol. 58(1), pages 9-40, October.
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Cited by:
  1. Tran, Ngoc-Khanh & Zeckhauser, Richard J., 2011. "The Behavior of Savings and Asset Prices When Preferences and Beliefs Are Heterogeneous," Working Paper Series rwp11-026, Harvard University, John F. Kennedy School of Government.
  2. Elyès Jouini & Clotilde Napp, 2010. "Unbiased Disagreement in financial markets, waves of pessimism and the risk return tradeoff," Post-Print halshs-00488481, HAL.
  3. Cvitanic, Jaksa & Malamud, Semyon, 2011. "Price impact and portfolio impact," Journal of Financial Economics, Elsevier, vol. 100(1), pages 201-225, April.
  4. Ani Guerdijkova & Emanuela Sciubba, 2012. "Survival with Ambiguity," Birkbeck Working Papers in Economics and Finance 1216, Birkbeck, Department of Economics, Mathematics & Statistics.

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