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Emotions, Bayesian Inference, and Financial Decision Making

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Author Info
Diego Salzman () (CORE, Université catholique de Louvain.)
Emanuel Trifan () (Institut für Volkswirtschaftslehre (Department of Economics), Technische Universität Darmstadt (Darmstadt University of Technology))
Abstract

This paper presents a model in which rational and emotional investors are compelled to make decisions under uncertainty in order to ensure their survival. Using a neurofinancial setting, we show that, when different investor types fight for market capital, emotional traders tend not only to influence prices but also to have a much more developed adaptive mechanism than their rational peers, in spite of their apparently simplistic demand strategy and distorted revision of beliefs. Our results imply that prices in financial markets could be seen more accurately as a thermometer of the market mood and emotions rather than as simple informative signals as stated in traditional financial theory.

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Publisher Info
Paper provided by Institut für Volkswirtschaftslehre (Department of Economics), Technische Universität Darmstadt (Darmstadt University of Technology) in its series Darmstadt Discussion Papers in Economics with number 166.

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Length: 30 pages
Date of creation: Oct 2005
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Handle: RePEc:tud:ddpiec:166

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Related research
Keywords: Judgement under uncertainty; Bayesian Inference; Behavioral Finance; Decision Making; Emotions;

Find related papers by JEL classification:
G1 - Financial Economics - - General Financial Markets

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References listed on IDEAS
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  1. Kirchler, Erich & Maciejovsky, Boris, 2002. " Simultaneous Over- and Underconfidence: Evidence from Experimental Asset Markets," Journal of Risk and Uncertainty, Springer, vol. 25(1), pages 65-85, July. [Downloadable!] (restricted)
  2. Fama, Eugene F, 1970. "Efficient Capital Markets: A Review of Theory and Empirical Work," Journal of Finance, American Finance Association, vol. 25(2), pages 383-417, May. [Downloadable!] (restricted)
  3. Grether, David M, 1980. "Bayes Rule as a Descriptive Model: The Representativeness Heuristic," The Quarterly Journal of Economics, MIT Press, vol. 95(3), pages 537-57, November. [Downloadable!] (restricted)
  4. Barberis, Nicholas & Shleifer, Andrei & Vishny, Robert, 1998. "A model of investor sentiment1," Journal of Financial Economics, Elsevier, vol. 49(3), pages 307-343, September. [Downloadable!] (restricted)
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