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Three different ways synchronization can cause contagion in financial markets

Author

Listed:
  • Naji Massad

    (CES - Centre d'économie de la Sorbonne - UP1 - Université Paris 1 Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique)

  • Jørgen Vitting Andersen

    (CES - Centre d'économie de la Sorbonne - UP1 - Université Paris 1 Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique)

Abstract

We introduce tools from statistical physics, to capture the dynamics of three different pathways, in which the synchronization of human decision making could lead to turbulent periods and contagion phenomena in financial markets. The first pathway is caused when stock market indices, seen as a set of coupled integrate-and-fire oscillators, synchronize in frequency. The integrate-and-fire dynamics happens due to "change blindness", a trait in human decision making where people have the tendency to ignore small changes, but take action when a large change happens. The second pathway happens due to feedback mechanisms between market performance, and the use certain (decoupled) trading strategies. The third pathway can take place because of communication and its impact on human decision making. A model is introduced where financial market performance has an impact on decision making through communication between people. On the other hand the sentiment created via communication has an impact on the financial market performance.

Suggested Citation

  • Naji Massad & Jørgen Vitting Andersen, 2017. "Three different ways synchronization can cause contagion in financial markets," Post-Print halshs-01673333, HAL.
    • Handle: RePEc:hal:journl:halshs-01673333
    Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-01673333
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    References listed on IDEAS

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