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Diversification, protection of liability holders and regulatory arbitrage


Koch-Medina, Pablo; Munari, Cosimo; Šikić, Mario (2017). Diversification, protection of liability holders and regulatory arbitrage. Mathematics and Financial Economics, 11(1):63-83.

Abstract

Any solvency regime for financial institutions should be aligned with the fundamental objectives of regulation: protecting liability holders and securing the stability of the financial system. The first objective leads to consider surplus-invariant capital adequacy tests, i.e. tests that do not depend on the surplus of a financial institution. We provide a complete characterization of closed, convex, surplus-invariant capital adequacy tests that highlights an inherent tension between surplus-invariance and the desire to give credit for diversification. The second objective leads to requiring consistency of capital adequacy tests across jurisdictions. Of particular importance in this respect are capital adequacy tests that remain invariant under a change of numéraire. We establish an intimate link between surplus- and numéraire invariant tests.

Abstract

Any solvency regime for financial institutions should be aligned with the fundamental objectives of regulation: protecting liability holders and securing the stability of the financial system. The first objective leads to consider surplus-invariant capital adequacy tests, i.e. tests that do not depend on the surplus of a financial institution. We provide a complete characterization of closed, convex, surplus-invariant capital adequacy tests that highlights an inherent tension between surplus-invariance and the desire to give credit for diversification. The second objective leads to requiring consistency of capital adequacy tests across jurisdictions. Of particular importance in this respect are capital adequacy tests that remain invariant under a change of numéraire. We establish an intimate link between surplus- and numéraire invariant tests.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:03 Faculty of Economics > Department of Banking and Finance
Dewey Decimal Classification:330 Economics
Language:English
Date:January 2017
Deposited On:21 Feb 2018 18:27
Last Modified:14 Mar 2018 17:58
Publisher:Springer
ISSN:1862-9679
OA Status:Closed
Publisher DOI:https://doi.org/10.1007/s11579-016-0171-y
Related URLs:http://www.zora.uzh.ch/id/eprint/123174/
Other Identification Number:merlin-id:15818

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