Sum of currency in circulation, reserve balances with Federal Reserve Banks, and service-related adjustments to compensate for float. Starting from July 18, 2012, the series is a sum of currency in circulation and reserve balances with Federal Reserve Banks. Service-related adjustments to compansate for float have been discontinued by the Board of Governors. For more details, see http://www.federalreserve.gov/releases/h41/Current/. Calculated by the Federal Reserve Bank of St. Louis.
Federal Reserve Bank of St. Louis, St. Louis Source Base [WSBASE], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/WSBASE/, July 7, 2015.