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

Release: Z.1 Financial Accounts of the United States  

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

Frequency:  Quarterly, End of Period

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.6 Money Stock Measures  

Units:  Billions of Dollars, Seasonally Adjusted

Frequency:  Monthly

The currency component of M1, sometimes called "money stock currency," is defined as currency in circulation outside the U.S. Treasury, Federal Reserve Banks, and vaults of depository institutions. Data on total currency in circulation are obtained weekly from balance sheets of the Federal Reserve Banks and from the U.S. Treasury. Weekly currency in circulation data are published each week on the Federal Reserve Board's H.4.1 statistical release "Factors Affecting Reserve Balances of Depository Institutions and Condition Statement of Federal Reserve Banks." Vault cash is reported on the FR 2900 and subtracted from total currency in circulation. For institutions that do not file the FR 2900, vault cash is estimated using data reported on the Call Reports.

For questions on the data, please contact the data source. For questions on FRED functionality, please contact us here.