Answer on Question #38086 - Economics - Macroeconomics
If the Fed sells $5 million worth of bonds to Econobank, the reserves of the bank will not change. The money supply will increase by $5 million*(1 - 0.1) = $4.5 million, as new money is created. If some people involved in the money creation process keep some of their funds as cash, the increase in money supply will be lower.