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Twin defaults and bank capital requirements

Caterina Mendicino (), Kalin Nikolov (), Juan-Rubio Ramirez, Javier Suarez () and Dominik Supera

No 2414, Working Paper Series from European Central Bank

Abstract: We examine optimal capital requirements in a quantitative general equilibrium model with banks exposed to non-diversifiable borrower default risk. Contrary to standard models of bank default risk, our framework captures the limited upside but significant downside risk of loan portfolio returns (Nagel and Purnanandam, 2020). This helps to reproduce the frequency and severity of twin defaults: simultaneously high firm and bank failures. Hence, the optimal bank capital requirement, which trades off a lower frequency of twin defaults against restricting credit provision, is 5pp higher than under standard default risk models which underestimate the impact of borrower default on bank solvency. JEL Classification: G01, G28, E44

Keywords: bank assets returns; default risk; financial intermediation; macroprudential policy (search for similar items in EconPapers)
Date: 2020-05
New Economics Papers: this item is included in nep-ban, nep-cba, nep-dge, nep-ifn, nep-mac, nep-opm and nep-rmg
Note: 1774743
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