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Efficiency and stability in complex financial markets


  • Caccioli, Fabio
  • Marsili, Matteo


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).
  • Handle: RePEc:zbw:ifwedp:20103

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    References listed on IDEAS

    1. Hillinger, Claude, 2008. "Science and Ideology in Economic, Political and Social Thought," Economics - The Open-Access, Open-Assessment E-Journal, Kiel Institute for the World Economy (IfW), vol. 2, pages 1-70.
    2. Rajan, Raghuram G., 2013. "The Credit Crisis and Cycle-Proof Regulation," Review, Federal Reserve Bank of St. Louis, issue Nov, pages 461-467.
    3. Reinhart, Carmen & Rogoff, Kenneth, 2009. "This Time It’s Different: Eight Centuries of Financial Folly-Preface," MPRA Paper 17451, University Library of Munich, Germany.
    4. Carmen M. Reinhart & Kenneth S. Rogoff, 2009. "Varieties of Crises and Their Dates," Introductory Chapters,in: This Time Is Different: Eight Centuries of Financial Folly Princeton University Press.
    5. Liebowitz Stan J, 2009. "ARMs, Not Subprimes, Caused the Mortgage Crisis," The Economists' Voice, De Gruyter, vol. 6(12), pages 1-5, November.
    6. Hillinger, Claude, 2008. "How to deal with the US financial crisis at no cost to the taxpayer," Discussion Papers in Economics 6929, University of Munich, Department of Economics.
    7. Reinhart, Karmen & Rogoff, Kenneth, 2009. ""This time is different": panorama of eight centuries of financial crises," Economic Policy, Russian Presidential Academy of National Economy and Public Administration, vol. 1, pages 77-114, March.
    8. Gerald P. Dwyer & R. W. Hafer, 1999. "Are money growth and inflation still related?," Economic Review, Federal Reserve Bank of Atlanta, issue Q2, pages 32-43.
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    More about this item


    Interacting agents models; market efficiency; market stability; statistical mechanics of financial market;

    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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