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

Release: Z.1 Financial Accounts of the United States  

Units:  Billions of Dollars, Not Seasonally Adjusted

Frequency:  Quarterly, End of Period

Notes:

Source ID: FL894104005.Q

For more information about the Flow of Funds tables, see the Financial Accounts Guide.

With each quarterly release, the source may make major data and structural revisions to the series and tables. These changes are available in the Release Highlights.

In the Financial Accounts, the source identifies each series by a string of patterned letters and numbers. For a detailed description, including how this series is constructed, see the series analyzer provided by the source.

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

Release: H.4.1 Factors Affecting Reserve Balances (data not included in press release)

Units:  Billions of Dollars, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Data prior to 1991 are from various issues of Banking and Monetary Statistics and the Annual Statistical Digest. Data from 1991 forward are calculated using data from the H.4.1 Release - Factors Affecting Reserve Balances.
As of March 1, 2019, this series is calculated as a monthly average of fred.stlouisfed.org/series/WCURCIR.