Bardoscia, M;
Barucca, P;
Battiston, S;
Caccioli, F;
Cimini, G;
Garlaschelli, D;
Saracco, F;
... Caldarelli, G; + view all
(2021)
The physics of financial networks.
Nature Reviews Physics
, 3
pp. 490-507.
10.1038/s42254-021-00322-5.
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Abstract
As the total value of the global financial market outgrew the value of the real economy, financial institutions created a global web of interactions that embodies systemic risks. Understanding these networks requires new theoretical approaches and new tools for quantitative analysis. Statistical physics contributed significantly to this challenge by developing new metrics and models for the study of financial network structure, dynamics, and stability and instability. In this Review, we introduce network representations originating from different financial relationships, including direct interactions such as loans, similarities such as co-ownership and higher-order relations such as contracts involving several parties (for example, credit default swaps) or multilayer connections (possibly extending to the real economy). We then review models of financial contagion capturing the diffusion and impact of shocks across each of these systems. We also discuss different notions of ‘equilibrium’ in economics and statistical physics, and how they lead to maximum entropy ensembles of graphs, providing tools for financial network inference and the identification of early-warning signals of system-wide instabilities.
| Type: | Article |
|---|---|
| Title: | The physics of financial networks |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s42254-021-00322-5 |
| Publisher version: | http://dx.doi.org/10.1038/s42254-021-00322-5 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Complex networks |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10130288 |
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