Tomo

Tomo

In macroeconomics, an open market operation (OMO) is an activity by a central bank to give (or take) liquidity in its currency to (or from) a bank or a group of banks. The central bank can either buy or sell government bonds (or other financial assets) in the open market (this is where the name was historically derived from) or, in what is now mostly the preferred solution, enter into a repo or secured lending transaction with a commercial bank: the central bank gives the money as a deposit for a defined period and synchronously takes an eligible asset as collateral. Central banks regularly use OMOs as one of their tools for implementing monetary policy. A frequent aim of open market operations is — aside from supplying commercial banks with liquidity and sometimes taking surplus liquidity from commercial banks — to influence the short-term interest rate. Open market operations have become less prominent in this respect since the global financial crisis, however, as many central banks have changed their monetary policy implementation to a so-called floor system (or system of ample reserves), in which there is abundant liquidity in the payments system. In that situation central banks no longer need to fine tune the supply of reserves to meet demand, implying that they may conduct OMOs less frequently. For countries operating under an exchange rate anchor, direct intervention in the foreign exchange market, which is a specific type of open market operations, may be an important tool to maintain the desired exchange rate.In the post-crisis economy, conventional short-term open market operations have been superseded by major central banks by quantitative easing (QE) programmes. QE are technically similar open-market operations, but entail a pre-commitment of the central bank to conduct purchases to a predefined large volume and for a predefined period of time. Under QE, central banks typically purchase riskier and longer-term securities such as long maturity sovereign bonds and even corporate bonds.

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