Money Supply, officially Money Stock Measures (H.6), counts US dollar holdings that make up M1 and M2. M1, or narrow money, covers the most liquid forms: physical cash outside vaults, checking-type demand deposits, and other liquid deposits including savings. M2, or broad money, equals M1 plus small time deposits under $100,000 and retail money market funds, or household-type fund balances, minus retirement accounts. The Federal Reserve Board, the central bank of the United States, compiles it from bank and fund reports. It is a statistical compilation, not a survey, with no stated sample size.
Monthly averages stretch back to January 1959 within statistics compiled since 1914. Components are shown for the whole industry rather than split by bank type. It covers neither M3 nor equities nor institutional funds, and it excludes foreign currency deposits, government deposits, and deposits owed to foreign banks. Levels are read in billions of dollars with no target level, and the aggregates help shape US monetary policy.