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The no-arbitrage condition and financial markets with heterogeneous information

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  • Kavous Ardalan
  • Kevin Hebner

Abstract

This paper examines the role of the no-arbitrage condition in financial markets with heterogeneous expectations. We consider a single-period, state-contingent claims model, withM risky securities andS states. There exist two types of heterogeneously informed investors, where the information heterogeneity is defined with respect to either the security payoff matrix, the state probability vector, or state partitions. When the information heterogeneity is defined with respect to either the security payoff matrix or state partitions, the no-arbitrage condition imposes a constraint on the dispersion of information between informed and uninformed investors. Further, the no-arbitrage condition is useful in ascertaining the patterns of heterogeneity among investors that are consistent with equilibrium. However, when the information heterogeneity is defined with respect to state probabilities, the role of the no-arbitrage condition is severely restricted. Finally, the no-arbitrage condition may have important implications for the (necessary and sufficient) conditions for the existence of an equilibrium price vector in financial markets with heterogeneous expectations. Copyright Springer 1998

Suggested Citation

  • Kavous Ardalan & Kevin Hebner, 1998. "The no-arbitrage condition and financial markets with heterogeneous information," Journal of Economics and Finance, Springer;Academy of Economics and Finance, vol. 22(1), pages 87-99, March.
    • Handle: RePEc:spr:jecfin:v:22:y:1998:i:1:p:87-99
    DOI: 10.1007/BF02823235
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