How Federal Reserve Policies Affect Interest Rates and the Inflation Rate (1994)

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• published: 14 Sep 2014
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By far the most visible and obvious power of many modern central banks is to influence market interest rates; contrary to popular belief, they rarely "set" rates to a fixed number. Although the mechanism differs from country to country, most use a similar mechanism based on a central bank's ability to create as much fiat money as required. The mechanism to move the market towards a 'target rate' (whichever specific rate is used) is generally to lend money or borrow money in theoretically unlimited quantities, until the targeted market rate is sufficiently close to the target. Central banks may do so by lending money to and borrowing money from (taking deposits from) a limited number of qualified banks, or by purchasing and selling bonds. As an example of how this functions, the Bank of Canada sets a target overnight rate, and a band of plus or minus 0.25%. Qualified banks borrow from each other within this band, but never above or below, because the central bank will always lend to them at the top of the band, and take deposits at the bottom of the band; in principle, the capacity to borrow and lend at the extremes of the band are unlimited.[19] Other central banks use similar mechanisms. It is also notable that the target rates are generally short-term rates. The actual rate that borrowers and lenders receive on the market will depend on (perceived) credit risk, maturity and other factors. For example, a central bank might set a target rate for overnight lending of 4.5%, but rates for (equivalent risk) five-year bonds might be 5%, 4.75%, or, in cases of inverted yield curves, even below the short-term rate. Many central banks have one primary "headline" rate that is quoted as the "central bank rate". In practice, they will have other tools and rates that are used, but only one that is rigorously targeted and enforced. "The rate at which the central bank lends money can indeed be chosen at will by the central bank; this is the rate that makes the financial headlines." – Henry C.K. Liu.[20] Liu explains further that "the U.S. central-bank lending rate is known as the Fed funds rate. The Fed sets a target for the Fed funds rate, which its Open Market Committee tries to match by lending or borrowing in the money market ... a fiat money system set by command of the central bank. The Fed is the head of the central-bank because the U.S. dollar is the key reserve currency for international trade. The global money market is a USA dollar market. All other currencies markets revolve around the U.S. dollar market." Accordingly the U.S. situation is not typical of central banks in general. A typical central bank has several interest rates or monetary policy tools it can set to influence markets. Marginal lending rate (currently 1% in the Eurozone[21]) – a fixed rate for institutions to borrow money from the central bank. (In the USA this is called the discount rate). Main refinancing rate (0.5% in the Eurozone[21]) – the publicly visible interest rate the central bank announces. It is also known as minimum bid rate and serves as a bidding floor for refinancing loans. (In the USA this is called the federal funds rate). Deposit rate, generally consisting of interest on reserves and sometimes also interest on excess reserves (0.00% in the Eurozone[21]) – the rates parties receive for deposits at the central bank. These rates directly affect the rates in the money market, the market for short term loans. Central banks implement a country's chosen monetary policy. At the most basic level, this involves establishing what form of currency the country may have, whether a fiat currency, gold-backed currency (disallowed for countries with membership of the International Monetary Fund), currency board or a currency union. When a country has its own national currency, this involves the issue of some form of standardized currency, which is essentially a form of promissory note: a promise to exchange the note for "money" under certain circumstances. Historically, this was often a promise to exchange the money for precious metals in some fixed amount. Now, when many currencies are fiat money, the "promise to pay" consists of the promise to accept that currency to pay for taxes. A central bank may use another country's currency either directly (in a currency union), or indirectly (a currency board). In the latter case, exemplified by Bulgaria, Hong Kong and Latvia, the local currency is backed at a fixed rate by the central bank's holdings of a foreign currency. The expression "monetary policy" may also refer more narrowly to the interest-rate targets and other active measures undertaken by the monetary authority. http://en.wikipedia.org/wiki/Central_bank#Interest_rates