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Estimating a structural model of herd behavior in financial markets

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  • Marco Cipriani
  • Antonio Guarino

Abstract

We develop a new methodology for estimating the importance of herd behavior in financial markets. Specifically, we build a structural model of informational herding that can be estimated with financial transaction data. In the model, rational herding arises because of information-event uncertainty. We estimate the model using 1995 stock market data for Ashland Inc., a company listed on the New York Stock Exchange. Herding occurs often and is particularly pervasive on certain days. In an information-event day, on average, 2 percent (4 percent) of informed traders herd-buy (sell). In 7 percent (11 percent) of information-event days, the proportion of informed traders who herd-buy (sell) is greater than 10 percent. Herding causes important informational inefficiencies, amounting, on average, to 4 percent of the asset's expected value.

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Bibliographic Info

Paper provided by Federal Reserve Bank of New York in its series Staff Reports with number 561.

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Date of creation: 2012
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Handle: RePEc:fip:fednsr:561

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Related research

Keywords: Financial markets ; Uncertainty ; Human behavior ; Information theory;

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  1. Chung, Kee H. & Li, Mingsheng & McInish, Thomas H., 2005. "Information-based trading, price impact of trades, and trade autocorrelation," Journal of Banking & Finance, Elsevier, vol. 29(7), pages 1645-1669, July.
  2. Mathias Drehmann & Jörg Oechssler, 2004. "Herding and Contrarian Behavior in Financial Markets - An Internet Experiment," Econometric Society 2004 North American Winter Meetings 55, Econometric Society.
  3. Antonio Guarino & Marco Cipriani, 2008. "Herd Behavior in Financial Markets: An Experiment with Financial Market Professionals," WEF Working Papers 0047, ESRC World Economy and Finance Research Programme, Birkbeck, University of London.
  4. Cipriani, M. & Guarino, A., 2008. "Herd behavior and contagion in financial markets," Open Access publications from University College London http://discovery.ucl.ac.u, University College London.
  5. Marco Cipriani & Antonio Guarino, 2005. "Herd Behavior in a Laboratory Financial Market," Experimental 0502002, EconWPA.
  6. Avery, Christopher & Zemsky, Peter, 1998. "Multidimensional Uncertainty and Herd Behavior in Financial Markets," American Economic Review, American Economic Association, vol. 88(4), pages 724-48, September.
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Cited by:
  1. Marco Cipriani & Antonio Guarino, 2009. "Herd Behavior in Financial Markets: An Experiment with Financial Market Professionals," Journal of the European Economic Association, MIT Press, vol. 7(1), pages 206-233, 03.

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