Capital requirements in a model of bank runs: The 2008 run on repo
Capital requirements involve a trade-off between financial intermediation and financial stability. I analyze this trade-off in a macroeconomic model that allows for systemic bank runs, à la Gertler and Kiyotaki (2015). I show that fixed capital requirements make the economy more prone to runs becaus...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-09-01
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| Series: | Latin American Journal of Central Banking |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666143821000181 |
| Summary: | Capital requirements involve a trade-off between financial intermediation and financial stability. I analyze this trade-off in a macroeconomic model that allows for systemic bank runs, à la Gertler and Kiyotaki (2015). I show that fixed capital requirements make the economy more prone to runs because they slow down the recovery and reduce welfare compared to the laissez-faire benchmark. On the other hand, appropriately chosen countercyclical capital requirements can increase financial stability and welfare. To weigh the costs and benefits of this policy, I estimate the probability of a systemic shock to the financial sector using a novel measure derived from CDS data and find it to be around 0.5% per year prior to the 2007-09 financial crisis. I then show that implementing a countercyclical capital requirement that would have prevented the run on repo markets in 2008 would have cost 3% of steady-state bank capital and less than 0.1% in consumption terms. |
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| ISSN: | 2666-1438 |