FED Interest Rates and it's mechanism

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In the United States, the federal funds rate is the interest rate at which depository institutions (banks and credit unions) lend reserve balances to other depository institutions overnight on an uncollateralized basis. Reserve balances are amounts held at the Federal Reserve to maintain depository institutions' reserve requirements. Institutions with surplus balances in their accounts lend those balances to institutions in need of larger balances. The federal funds rate is an important benchmark in financial markets.

The effective federal funds rate (EFFR) is calculated as the effective median interest rate of overnight federal funds transactions during the previous business day. It is published daily by the Federal Reserve Bank of New York.

The federal funds target range is determined by a meeting of the members of the Federal Open Market Committee (FOMC) which normally occurs eight times a year about seven weeks apart. The committee may also hold additional meetings and implement target rate changes outside of its normal schedule.

The Federal Reserve uses open market operations to bring the effective rate into the target range. The target range is chosen in part to influence the money supply in the U.S. economy

Financial institutions are obligated by law to hold liquid assets that can be used to cover sustained net cash outflows. Among these assets are the deposits that the institutions maintain, directly or indirectly, with a Federal Reserve Bank. An institution that is below its required liquidity can address this temporarily by borrowing from institutions that have Federal Reserve deposits in excess of the requirement. The interest rate that a borrowing bank pays to a lending bank to borrow the funds is negotiated between the two banks, and the weighted average of this rate across all such transactions is the effective federal funds rate.

The Federal Open Market Committee regularly sets a target range for the federal funds rate according to its policy goals and the economic conditions of the United States. It directs the Federal Reserve Banks to influence the rate toward that range with open market operations or adjustments to their own deposit interest rates. Although this is commonly referred to as "setting interest rates," the effect is not immediate and depends on the banks' response to money market conditions. Separately, the Federal Reserve lends directly to institutions through its discount window, at a rate that is usually higher than the federal funds rate.

Future contracts in the federal funds rate trade on the Chicago Board of Trade (CBOT), and the financial press refer to these contracts when estimating the probabilities of upcoming FOMC actions.

When the FOMC wishes to reduce interest rates they will increase the supply of money by buying government securities. When additional supply is added and everything else remains constant, the price of borrowed funds – the federal funds rate – falls. Conversely, when the Committee wishes to increase the federal funds rate, they will instruct the Desk Manager to sell government securities, thereby taking the money they earn on the proceeds of those sales out of circulation and reducing the money supply. When supply is taken away and everything else remains constant, the interest rate will normally rise.

The Federal Reserve has responded to a potential slow-down by lowering the target federal funds rate during recessions and other periods of lower growth. In fact, the Committee's lowering has recently predated recessions, in order to stimulate the economy and cushion the fall. Reducing the federal funds rate makes money cheaper, allowing an influx of credit into the economy through all types of loans.