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

Release: H.4.1 Factors Affecting Reserve Balances  

Units:  Billions of Dollars, Not Seasonally Adjusted

Frequency:  Weekly, Ending Wednesday

Notes:

On 2023-05-04 the values for this series were revised due to a calculation error.
Averages of daily figures. Please note breaks in data:
Data prior to 2003-01-09 contain adjustment, extended, and seasonal credit.
Data from 2003-01-09 to 2008-03-13 include primary, secondary, and seasonal credit.
As of 2008-03-20, data include primary, secondary, and seasonal credit, primary dealer credit facility, and other credit extensions but excludes term auction credit.
Beginning on 2008-09-24, the data include primary, secondary, and seasonal credit, primary dealer and other broker-dealer credit, asset-backed commercial paper money market mutual fund liquidity facility, and other credit extensions.
Data from 2008-11-26 also contain credit extended to American International Group, Inc., which was previously included in other credit extensions. Term auction credit is excluded.

This series is calculated by the Federal Reserve Bank of St. Louis using historical data from the Board of Governors' H.4.1 press releases.