Christoph Siebenbrunner , Martin Hafner-Guth , Ralph Spitzer , Stefan Trappl
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Assessing the systemic risk impact of bank bail-ins
Financial regulation has introduced bail-ins (i.e. enforced debt-to-equity swaps) as a tool for orderly bank resolution, and hence it is the authorities’ task to decide when to apply this tool in a resolution. We present a quantitative framework to support this decision by computing the systemic impact of a bail-in. Our model takes into account systemic feedback effects using state-of-the-art multilayer contagion models, which we extend to include liquidation losses. Using real-world data for the Austrian banking system, we perform an empirical assessment of the systemic risk impact of idiosyncratic and systemic shocks. Our results show that bail-ins have the potential to reduce systemic risk compared to insolvencies for the Austrian banking system. They also incur lower social cost than bail-outs, but only for moderate, idiosyncratic crises. Our findings quantitatively corroborate earlier discussions that bail-ins may be an inadequate tool to deal with systemic crises. This suggests that the bail-in mechanism alone may not be sufficient to rule out future bail-outs.
期刊介绍:
The Journal of Financial Stability provides an international forum for rigorous theoretical and empirical macro and micro economic and financial analysis of the causes, management, resolution and preventions of financial crises, including banking, securities market, payments and currency crises. The primary focus is on applied research that would be useful in affecting public policy with respect to financial stability. Thus, the Journal seeks to promote interaction among researchers, policy-makers and practitioners to identify potential risks to financial stability and develop means for preventing, mitigating or managing these risks both within and across countries.