Emergence of universal scaling in financial markets from mean-field dynamics

Details Emergence of universal scaling in financial markets from mean-field dynamics Emergence of universal scaling in financial markets from mean-field dynamics

2010-06-03

arxiv.org/abs/1006.0628v1

Economy

Quantitative Finance

Statistical Finance

5 pages, 3 figures

Scientific paper

Collective phenomena with universal properties have been observed in many complex systems with a large number of components. Here we present a microscopic model of the emergence of scaling behavior in such systems, where the interaction dynamics between individual components is mediated by a global variable making the mean-field description exact. Using the example of financial markets, we show that asset price can be such a global variable with the critical role of coordinating the actions of agents who are otherwise independent. The resulting model accurately reproduces empirical properties such as the universal scaling of the price fluctuation and volume distributions, long-range correlations in volatility and multiscaling.

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