Open market
operation (OMO) is a monetary policy by the central bank in which the bank
deals in the sale and purchase of securities in the open market to control the
supply of money in the economy. By selling the securities, the central bank
soaks liquidity from the economy which controls the inflation in the economy by decreasing the purchasing power of the people and by buying the securities, the central bank
releases liquidity which controls deflation in the economy by increasing the purchasing power of the people.