Controlling systemic risk - network structures that minimize it and node properties to calculate it
| Autor: | Vinko Zlatić, Hrvoje Štefančić, Sebastian M. Krause, Guido Caldarelli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics - Physics and Society
Computer science Monte Carlo method Stability (learning theory) FOS: Physical sciences Physics and Society (physics.soc-ph) 01 natural sciences Measure (mathematics) 010305 fluids & plasmas FOS: Economics and business 0103 physical sciences Economics - Theoretical Economics Systemic risk Econometrics 010306 general physics Assortativity Node (networking) Scalar (physics) Physik (inkl. Astronomie) Condensed Matter Physics Settore FIS/02 - Fisica Teorica Modelli e Metodi Matematici risk management theoretical economics physics and society Risk Management (q-fin.RM) Theoretical Economics (econ.TH) A priori and a posteriori Finance Quantitative Finance - Risk Management |
| Zdroj: | Physical Review E |
| DOI: | 10.1103/physreve.103.042304 |
| Popis: | Evaluation of systemic risk in networks of financial institutions in general requires information of inter-institution financial exposures. In the framework of Debt Rank algorithm, we introduce an approximate method of systemic risk evaluation which requires only node properties, such as total assets and liabilities, as inputs. We demonstrate that this approximation captures a large portion of systemic risk measured by Debt Rank. Furthermore, using Monte Carlo simulations, we investigate network structures that can amplify systemic risk. Indeed, while no topology in general sense is {\em a priori} more stable if the market is liquid [1], a larger complexity is detrimental for the overall stability [2]. Here we find that the measure of scalar assortativity correlates well with level of systemic risk. In particular, network structures with high systemic risk are scalar assortative, meaning that risky banks are mostly exposed to other risky banks. Network structures with low systemic risk are scalar disassortative, with interactions of risky banks with stable banks. 10 pages. 4 figures |
| Databáze: | OpenAIRE |
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