The U.S. money supply is all the physical cash in circulation throughout the nation, as well as the money held in checking accounts and savings accounts. Who governs it? According to data from the Federal Reserve, as of June 2020 a little over $5.2 trillion in M1 money was in circulation, and more than $18.1 trillion in M2 money was circulating in the United States.. It equals the currency held by public plus demand deposits at banks and monetary base is the sum of total currency in circulation and the amount held by banks as reserves. Accessed Jan. 13, 2020. Central banks will no longer regulate the money supply. "The Money Supply." Presented by- Suparna pani CONTROL OF MONEY SUPPLY 2.