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Rational Herd Behavior and the Globalization of Securities Markets

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  • Calvo, Guillermo A.
  • Mendoza, Enrique

Abstract

This paper shows that globalization of securities markets exacerbates the volatility of capital flows by strengthening incentives for herding behavior. This is a prediction of a mean-variance portfolio optimization model with imperfect information, in which investors acquire country-specific expertise at a fixed cost and incur variable reputational costs. The model produces equilibria in which incentives to confirm rumors decrease with globalization. Simulations based on equity markets data and country credit ratings suggest that herd behavior can induce large capital outflows from emerging markets.

Suggested Citation

  • Calvo, Guillermo A. & Mendoza, Enrique, 1997. "Rational Herd Behavior and the Globalization of Securities Markets," Working Papers 97-26, Duke University, Department of Economics.
    • Handle: RePEc:duk:dukeec:97-26
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    JEL classification:

    • F30 - International Economics - - International Finance - - - General
    • F34 - International Economics - - International Finance - - - International Lending and Debt Problems
    • F36 - International Economics - - International Finance - - - Financial Aspects of Economic Integration
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets

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