Source: Board of Governors of the Federal Reserve System (US)  

Release: H.4.1 Factors Affecting Reserve Balances  

Units:  Millions of U.S. Dollars, Not Seasonally Adjusted

Frequency:  Weekly, As of Wednesday

Notes:

FRBNY, on behalf of the Federal Reserve System, provides correspondent and custodial banking services for central banks, monetary authorities, and certain international organizations to facilitate their official financial operations.