DP7819 | Banking-on-the-Average Rules

Publication Date

23/05/2010

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Abstract

In this paper, we introduce a new requirement for bank capital: banking-on-the-average rules. Under these rules a bank?s required level of equity capital is monotonically increasing in the realized equity capital of its peers. In a simple model we illustrate the workings of banking-on-the-average rules. We show that in booms these rules can prevent banks from taking excessive risks. Moreover, they alleviate the socially harmful procyclicality of conventional equity-capital rules, which may induce banks to cut back excessively on lending. Finally, we argue that under these rules prudent banks can impose prudency on other banks. In addition, banking-on-the-average rules ensure the build-up of bank equity capital in booms and thus avoid excessive leverage.