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arXiv 0807.1888q-fin.TRcond-mat.stat-mechphysics.soc-ph
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金融市场中典型事实的起源和自组织的最小主体模型

Minimal Agent Based Model For The Origin And Self-Organization Of Stylized Facts In Financial Markets

V. Alfi, L. Pietronero, A. Zaccaria

摘要:

我们引入了一个最小的基于代理的模型与两类代理,基本面(稳定)和chartists(不稳定),我们专注于基本功能,可以产生程式化的事实。这导致了一个详细的了解胖尾和波动率聚集的起源,我们提出了一个机制,在准临界状态下的市场动态的自组织。程式化的事实被证明是对应于有限大小的影响,然而,可以在不同的时间尺度上活跃。这意味着,在描述这些属性的有效临界指数的普遍性,不能指望。引入一个阈值在代理人的行动(小的价格波动导致没有行动)触发自组织的准临界状态。活性剂的数量及其作用的非平稳性起着重要作用。该模型可以很容易地以系统的方式推广到更现实的变体。

英文摘要:

We introduce a minimal Agent Based Model with two classes of agents, fundamentalists (stabilizing) and chartists (destabilizing) and we focus on the essential features which can generate the stylized facts. This leads to a detailed understanding of the origin of fat tails and volatility clustering and we propose a mechanism for the self-organization of the market dynamics in the quasi-critical state. The stylized facts are shown to correspond to finite size effects which, however, can be active at different time scales. This implies that universality cannot be expected in describing these properties in terms of effective critical exponents. The introduction of a threshold in the agents' action (small price fluctuations lead to no-action) triggers the self-organization towards the quasi-critical state. Non-stationarity in the number of active agents and in their action plays a fundamental role. The model can be easily generalized to more realistic variants in a systematic way.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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