Berlin 2008 – wissenschaftliches Programm
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AKSOE: Arbeitskreis Physik sozio-ökonomischer Systeme
AKSOE 16: Financial Markets and Risk Management III
AKSOE 16.3: Vortrag
Donnerstag, 28. Februar 2008, 14:30–15:00, EW 203
Time scales and asynchronism in a simple model of financial markets — •Giancarlo Mosetti1,2 and Damien Challet1 — 1ISI Foundation- Torino, Italy — 2Fribourg University- Fribourg, Switzerland
Financial markets are very complex system. Time, in its broadest sense, has probably the biggest impact in their complexity. For example, it has been claimed that lack of a clear time scale in market agent's behavior allows many heterogeneous beliefs to flourish and interact in a kind of symbiotic relationship.
In the first part of my talk I will analyse using a simple model of financial markets, the Minority Game [1], the interaction of agents with different time scales. The model displays interesting behavior, with phases in which faster agents (speculators) perform better than slower agents (producers), but also phases in which the opposite is true. Analytical as well as numerical results will be presented [2].
In the second part I will discuss another time related phenomenon in financial markets: the delay between submission and execution times of an order in a market, still in the framework of the Minority Game. We will see how a simple modification of the model gives rise to an interesting dynamics.
Bibliography
[1] D. Challet and Y.-C. Zhang, Emergence of Cooperation and Organization in an evolutionary Game, Physica A 246, (1997)
[2] G. Mosetti, D., Challet, Yi-cheng Zhang, Heterogeneous timescales in Minority Games, Physica A 365, (2005)