M1, M2, M3 and L - Money Supply

Money Supply

The total stock of money in the economy; currency held by the public plus money in accounts in banks. It consists primarily currency in circulation and deposits in savings and checking accounts. Too much money in relation to the output of goods tends to push interest rates down and push inflation up; too little money tends to push rates up and prices down, causing unemployment and idle plant capacity. The central bank manages the money supply by raising and lowering the reserves banks are required to hold and the discount rate at which they can borrow money from the central bank. The central bank also trades government securities (called repurchase agreements) to take money out of the system or put it in. There are various measures of money supply, including M1, M2, M3 and L; these are referred to as monetary aggregates.