Autori
Parpinel, Francesca
Pizzi, Claudio
Frattarolo, Lorenzo

Titolo
Combining permutation tests to rank systemically important banks
Periodico
Statistical methods & applications : Journal of the Italian Statistical Society
Anno: 2020 - Volume: 29 - Fascicolo: 3 - Pagina iniziale: 581 - Pagina finale: 596

In this work we propose the use of a nonparametric procedure to investigate the relationship between the Regulator’s Global Systemically Important Banks (G-SIBs) classification and the equity-based systemic risk measures. The proposed procedure combines several permutation tests to investigate the equality of the multivariate distribution of two groups and assumes only the hypothesis of exchangeability of variables. In our novel approach, the weights used in the combination of tests are obtained using the Particle Swarm Optimization heuristic and quantify the informativeness about the selection. Finally, the p value of the combined test measures the reliability of the result. Empirical results about the selection of G-SIBs show how considering the systematic (β), stress (ΔCoVaR) and connectedness components (in–out connection) of systemic risk cover more than 70% of weight in all the considered years.



SICI: 1618-2510(2020)29:3<581:CPTTRS>2.0.ZU;2-B

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