Herd Behavior and Contagion in Financial Markets
AbstractWe study a sequential trading financial market where there are gains from trade, i.e., where informed traders have heterogeneous private values. We show that an informational cascade (i.e., a complete blockage of information) arises and prices fail to aggregate information dispersed among traders. During an informational cascade, all traders with the same preferences choose the same action, either following the market (herding) or going against it (contrarianism). We also study financial contagion by extending our model to a two-asset economy. We show that informational cascades in one market can be generated by informational spillovers from the other. Such spillovers have pathological consequences, generating long-lasting misalignments between prices and fundamentals.
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Bibliographic InfoPaper provided by The George Washington University, Institute for International Economic Policy in its series Working Papers with number 2010-01.
Length: 58 pages
Date of creation:
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Publication status: Published in the B.E. Journal of Theoretical Economics, 8(1), Article 24, pp. 1-54, 2008
herd behavior; financial contagion; social learning; informational cascades; financial crises;
Other versions of this item:
- D8 - Microeconomics - - Information, Knowledge, and Uncertainty
- G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
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