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The origin of stock-market crashes: proposal for a mimetic model using behavioral assumptions and an analysis of legal mimicry

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  • Aldo Levy

    (GREG - CRC - Groupe de recherche en économie et en gestion - Centre de recherche en comptabilité - CNAM - Conservatoire National des Arts et Métiers [CNAM] - HESAM - HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université)

  • Larry Bensimhon

    (GREG - CRC - Groupe de recherche en économie et en gestion - Centre de recherche en comptabilité - CNAM - Conservatoire National des Arts et Métiers [CNAM] - HESAM - HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université)

Abstract

A number of phenomena are responsible for market crashes, but an analysis of investor behavior will tell us more than the valuation of securities on their fundamentals. In this regard, the interpretation of information seems to play a central role in these exceptional events. One specific type of mimetic behavior, called informational mimicry , sheds light on the kind of sudden, precipitous price plunges seen in 1929, 1987, and 2000. The current financial crisis certainly exhibits these mechanisms, but one of its novelties is related to a new form of herd behavior arising from the international legislative alignment of financial accounting data. In fact, the new IAS-IFRS standards have produced certain pernicious, globalized effects that may be described as "legal mimicry". Among the items most commonly blamed for this "Panurgic" behavior, Fair Market Valuation and the valuation of financial instruments appear to have been the major mechanisms involved in spreading the crisis. Indeed, they lent support to one of the causes of the current crash, via securitization.

Suggested Citation

  • Aldo Levy & Larry Bensimhon, 2010. "The origin of stock-market crashes: proposal for a mimetic model using behavioral assumptions and an analysis of legal mimicry," Post-Print halshs-00593986, HAL.
    • Handle: RePEc:hal:journl:halshs-00593986
    Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-00593986
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    References listed on IDEAS

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