Updates of this series will be ceased on December 20, 2019. Interested users can construct a proxy by summing Currency in circulation (H.4.1 release); Service Related Balances and Adjustments (H.4.1 release); and Reserve Balances with FR Banks (H.4.1 release). The discontinued series plotted on the same graph with the calculated data can be accessed for comparison at https://fred.stlouisfed.org/graph/?g=oJ6w
For more details, see the FRED Announcement.
Federal Reserve Bank of St. Louis, St. Louis Source Base (DISCONTINUED) [SBASENS], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/SBASENS, September 20, 2021.