arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.05623physics.soc-phcond-mat.stat-mechcs.SIq-fin.RM
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金融网络的物理学

The Physics of Financial Networks

Marco Bardoscia, Paolo Barucca, Stefano Battiston, Fabio Caccioli, Giulio Cimini, Diego Garlaschelli, Fabio Saracco, Tiziano Squartini, Guido Caldarelli

摘要:

金融网络领域是统计物理学的新应用的一个重要例子,这些应用已经通过当前的数据革命成为可能。由于全球金融市场的总价值已经大大超过了实体经济的价值,这个星球上的金融机构已经创建了一个相互作用的网络,其规模和拓扑结构需要通过复杂网络进行定量分析。金融网络不仅是使用统计物理学基本工具(如系综表示和熵最大化)的游乐场;相反,它们特定的动态和演变引发了理论进步,如DebtRank的定义,以衡量冲击在整个系统中的影响和扩散。本文从金融网络的不同定义出发,介绍了金融网络的研究现状(根据贷款、资产所有权、涉及多方的合同--如信用违约互换,当公司被引入游戏并与实体经济建立联系时,然后讨论了金融传染的各种动力学以及在金融网络推理和验证中的应用。我们认为,这一分析特别及时,因为金融稳定以及最近的气候融资创新,一旦从复杂网络理论的角度进行适当的分析和理解,就可以在我们的社会向更可持续的世界转型方面发挥关键作用。

英文摘要:

The field of Financial Networks is a paramount example of the novel applications of Statistical Physics that have made possible by the present data revolution. As the total value of the global financial market has vastly outgrown the value of the real economy, financial institutions on this planet have created a web of interactions whose size and topology calls for a quantitative analysis by means of Complex Networks. Financial Networks are not only a playground for the use of basic tools of statistical physics as ensemble representation and entropy maximization; rather, their particular dynamics and evolution triggered theoretical advancements as the definition of DebtRank to measure the impact and diffusion of shocks in the whole systems. In this review we present the state of the art in this field, starting from the different definitions of financial networks (based either on loans, on assets ownership, on contracts involving several parties -- such as credit default swaps, to multiplex representation when firms are introduced in the game and a link with real economy is drawn) and then discussing the various dynamics of financial contagion as well as applications in financial network inference and validation. We believe that this analysis is particularly timely since financial stability as well as recent innovations in climate finance, once properly analysed and understood in terms of complex network theory, can play a pivotal role in the transformation of our society towards a more sustainable world.

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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