Money Supply A model of money supply The monetary base: C+R The reserve-deposit ratio: rr=R/D The currency-deposit ratio: cr= C/D Money supply: M=C+ D Monetary base: B=C+ RMoney Supply  A model of money supply The monetary base: C+R The reserve-deposit ratio: rr = R/D The currency-deposit ratio: cr = C/D Money supply: M = C + D Monetary base: B = C + R