Contingent Liability, Capital Requirements, and Financial Reform

Recently, it has been argued that banks hold an insufficient amount of capital. Put differently, banks issue too much debt relative to equity. This claim is particularly important because, all else equal, lower levels of capital put banks at greater risk of insolvency. As a result, some have advocated imposing capital requirements on banks. However, even if one accepts the proposition that banks hold too little capital, it does not necessarily follow that the correct policy response is to force banks to hold more capital. An alternative to higher capital requirements is a system in which banks have contingent liability. Under contingent liability, shareholders are liable for at least some portion of depositor losses. This alternative is not unprecedented. Historical evidence from the United States and elsewhere suggest that banks with contingent liability have more desirable characteristics than those with limited liability and that depositors tend to prefer contingent liability when given the choice. Successful banking reform should be aimed at re-aligning bank incentives rather than providing new rules for bank behavior.