 Because of the prevalence of fractional reserve banking, the broad money supply of most countries is a multiple (greater than 1) of the amount of base money created by the country's central bank.That multiple (called the money multiplier) is determined by the reserve requirement or other financial ratio requirements imposed by financial regulators.The money supply of a country is usually held to be the total amount of currency in circulation plus the total value of checking and savings deposits in the commercial banks in the country.