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Volatility Clustering In Financial Markets: A Microsimulation Of Interacting Agents

Author

Listed:
  • THOMAS LUX

    () (Department of Economics, University of Kiel, Olshausenstr. 40, 24118 Kiel, Germany)

  • MICHELE MARCHESI

    () (Department of Electrical and Electronic Engineering, University of Cagliari, piazza D'Armi, 09123 Cagliari, Italy)

Abstract

The finding of clustered volatility and ARCH effects is ubiquitous in financial data. This paper presents a possible explanation for this phenomenon within a multi-agent framework of speculative activity. In the model, both chartist and fundamentalist strategies are considered with agents switching between both behavioural variants according to observed differences in pay-offs. Price changes are brought about by a market maker reacting to imbalances between demand and supply. Most of the time, a stable and efficient market results. However, its usual tranquil performance is interspersed by sudden transient phases of destabilisation. An outbreak of volatility occurs if the fraction of agents using chartist techniques surpasses a certain threshold value, but such phases are quickly brought to an end by stabilising tendencies. Formally, this pattern can be understood as an example of a new type of dynamic behaviour known as "on-off intermittency" in physics literature. Statistical analysis of simulated time series shows that the main stylised facts (unit roots in levels together with heteroscedasticity and leptokurtosis of returns) can be found in this "artificial" market.

Suggested Citation

  • Thomas Lux & Michele Marchesi, 2000. "Volatility Clustering In Financial Markets: A Microsimulation Of Interacting Agents," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 3(04), pages 675-702.
  • Handle: RePEc:wsi:ijtafx:v:03:y:2000:i:04:n:s0219024900000826
    DOI: 10.1142/S0219024900000826
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