Reserves and Where to Find Them

Banks use central bank reserves for a multitude of purposes including making payments, managing intraday liquidity outflows, and meeting regulatory and internal liquidity requirements. Data on aggregate reserves for the U.S. banking system are readily accessible, but information on the holdings of individual banks is confidential. This makes it difficult to investigate important questions like: “Which types of banks hold reserves?” “How concentrated are they?” and “Does the distribution change over time or in response to significant events?” In this post, we summarize how non-confidential data can be used to answer these questions by providing publicly available proxies for bank-level reserves.
When Are Central Bank Reserves Ample?

The Federal Reserve (Fed) implements monetary policy in a regime of ample reserves, whereby short-term interest rates are controlled mainly through the setting of administered rates. To do so, the quantity of reserves in the banking system needs to be large enough that everyday changes in reserves do not cause large variations in the policy rate, the so-called federal funds rate. As the Fed shrinks its balance sheet following the plan laid out by the Federal Open Market Committee (FOMC) in 2022, how can it assess when to stop so that the supply of reserves remains ample? In the first post of a two-part series, based on the methodology developed in our recent Staff Report, we propose to assess the ampleness of reserves in real time by estimating the slope of the reserve demand curve.