Price Drops, Fluctuations, and Correlation in a Multi-Agent Model of Stock Markets

Details Price Drops, Fluctuations, and Correlation in a Multi-Agent Model of Stock Markets Price Drops, Fluctuations, and Correlation in a Multi-Agent Model of Stock Markets

2002-04-26

arxiv.org/abs/cond-mat/0204574v1

Physica A, 316 (2002), pp 403-412

Physics

Condensed Matter

Statistical Mechanics

11 pages, 5 figures, 2 tables; submitted to Physica A

Scientific paper

10.1016/S0378-4371(02)01213-X

In this paper we compare market price fluctuations with the response to fundamental price drops within the Lux-Marchesi model which is able to reproduce the most important stylized facts of real market data. Major differences can be observed between the decay of spontaneous fluctuations and of changes due to external perturbations reflecting the absence of detailed balance, i.e., of the validity of the fluctuation-dissipation theorem. We found that fundamental price drops are followed by an overshoot with a rather robust characteristic time.

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