The series equals total balances maintained plus currency in circulation.
Effective February 2, 1984, reserve computation and maintenance periods have been changed from weekly to bi-weekly. Series with data prior to February 2, 1984 have different values reported from one week to the next. After February 2, 1984, the value repeats for 2 consecutive weeks.
Board of Governors of the Federal Reserve System (US), Monetary Base; Total [BOGMBASEW], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/BOGMBASEW, August 8, 2020.
Updates of this series will be ceased on December 19, 2019. This series doesn't convey any additional information beyond what's available in the base series published through the H.3 release, BOGMBASEW. View both series (plotted on the same graph) for comparison here.
For more details, see the FRED Announcement.
Federal Reserve Bank of St. Louis, St. Louis Adjusted Monetary Base (DISCONTINUED) [BASENS], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/BASENS, August 8, 2020.