Caught between Scylla and Charybdis? Regulating Bank Leverage When There is Rent-Seeking and Risk-Shifting

59 Pages Posted: 1 Mar 2012

See all articles by Viral V. Acharya

Viral V. Acharya

New York University (NYU) - Leonard N. Stern School of Business; New York University (NYU) - Department of Finance; Centre for Economic Policy Research (CEPR); European Corporate Governance Institute (ECGI); National Bureau of Economic Research (NBER)

Hamid Mehran

Independent

Anjan V. Thakor

Washington University in St. Louis - John M. Olin Business School; Financial Theory Group; European Corporate Governance Institute (ECGI); Massachusetts Institute of Technology (MIT) - Laboratory for Financial Engineering

Multiple version iconThere are 3 versions of this paper

Date Written: February 2012

Abstract

We consider a model in which banks face two moral hazard problems: 1) asset substitution by shareholders, which can occur when banks make socially-inefficient, risky loans; and 2) managerial under-provision of effort in loan monitoring. The privately-optimal level of bank leverage is neither too low nor too high: It efficiently balances the market discipline that owners of risky debt impose on managerial shirking in monitoring loans against the asset substitution induced at high levels of leverage. However, when correlated bank failures can impose significant social costs, regulators may bail out bank creditors. Anticipation of this action generates an equilibrium featuring systemic risk, in which all banks choose inefficiently high leverage to fund correlated, excessively risky assets. That is, regulatory forbearance itself becomes a source of systemic risk. Leverage can be reduced via a minimum equity capital requirement, which can rule out asset substitution. But this also compromises market discipline by making bank debt too safe. Optimal capital regulation requires that a part of bank capital be invested in safe assets and be attached with contingent distribution rights, in particular, be unavailable to creditors upon failure so as to retain market discipline and be made available to shareholders only contingent on good performance in order to contain risk-taking.

Keywords: asset substitution, bailout, market discipline, systemic risk

JEL Classification: G21, G28, G32, G35, G38

Suggested Citation

Acharya, Viral V. and Acharya, Viral V. and Mehran, Hamid and Thakor, Anjan V., Caught between Scylla and Charybdis? Regulating Bank Leverage When There is Rent-Seeking and Risk-Shifting (February 2012). CEPR Discussion Paper No. DP8822, Available at SSRN: https://ssrn.com/abstract=2013813

Viral V. Acharya (Contact Author)

New York University (NYU) - Leonard N. Stern School of Business ( email )

44 West 4th Street
Suite 9-160
New York, NY NY 10012
United States
2129980354 (Phone)
2129954256 (Fax)

HOME PAGE: http://www.stern.nyu.edu/~vacharya

New York University (NYU) - Department of Finance ( email )

Stern School of Business
44 West 4th Street
New York, NY 10012-1126
United States

Centre for Economic Policy Research (CEPR) ( email )

London
United Kingdom

European Corporate Governance Institute (ECGI) ( email )

c/o the Royal Academies of Belgium
Rue Ducale 1 Hertogsstraat
1000 Brussels
Belgium

National Bureau of Economic Research (NBER) ( email )

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

Hamid Mehran

Independent ( email )

Anjan V. Thakor

Washington University in St. Louis - John M. Olin Business School ( email )

One Brookings Drive
Campus Box 1133
St. Louis, MO 63130-4899
United States

Financial Theory Group ( email )

United States

European Corporate Governance Institute (ECGI) ( email )

c/o the Royal Academies of Belgium
Rue Ducale 1 Hertogsstraat
1000 Brussels
Belgium

Massachusetts Institute of Technology (MIT) - Laboratory for Financial Engineering ( email )

100 Main Street, E62-618
Cambridge, MA 02142
United States

Do you have negative results from your research you’d like to share?

Paper statistics

Downloads
11
Abstract Views
1,801
PlumX Metrics