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Efficiency and stability in complex financial markets

Author

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  • Caccioli, Fabio
  • Marsili, Matteo

Abstract

The authors study a simple model of an asset market with informed and non-informed agents. In the absence of non-informed agents, the market becomes information efficient when the number of traders with different private information is large enough. Upon introducing non-informed agents, the authors find that the latter contribute significantly to the trading activity if and only if the market is (nearly) information efficient. This suggests that information efficiency might be a necessary condition for bubble phenomena - induced by the behavior of non-informed traders - or conversely that throwing some sands in the gears of financial markets may curb the occurrence of bubbles.

Suggested Citation

  • Caccioli, Fabio & Marsili, Matteo, 2010. "Efficiency and stability in complex financial markets," Economics Discussion Papers 2010-3, Kiel Institute for the World Economy (IfW Kiel).
    • Handle: RePEc:zbw:ifwedp:20103
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    More about this item

    Keywords

    Interacting agents models; market efficiency; market stability; statistical mechanics of financial market;
    All these keywords.

    JEL classification:

    • G01 - Financial Economics - - General - - - Financial Crises
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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