Deposit Insurance Premiums and Bank Risk

Abstract

Deposit insurance premiums impose costs on banks’ balance sheets, narrowing profit margins and inducing banks to “search for yield.” This paper estimates the effects of deposit insurance premiums on bank portfolio rebalancing using supervisory data and a kink in the insurance premium schedule. We show that deposit insurance premiums weaken banks’ demand for reserves (a liquid asset with no credit risk) and strengthen the supply of short-term interbank loans (a less liquid asset with credit risk). We discuss the implications of these findings for optimal deposit insurance pricing.