what are federal funds 
federal funds often referred to as fed funds are excess reserves that commercial banks and other financial institutions deposit at regional federal reserve banks these funds can be lent then to other market participants with insufficient cash on hand to meet their lending and reserve needs the loans are unsecured and are made at a relatively low interest rate called the federal funds rate or overnight rate as that is the period for which most such loans are made understanding federal fundsfed funds help commercial banks meet their daily reserve requirements which is the amount of money that banks are required to maintain at their regional federal reserve reserve requirements are based on the volume of customer deposits that each bank holds excess or secondary reserves are cash amounts held by a bank or financial institution in excess of what is required by regulators creditors or internal controls for commercial banks excess reserves are measured against standard reserve requirement amounts set by central banking authorities these required reserve ratios set the minimum liquid deposits such as cash that must be in reserve at a bank more is considered excess the federal reserve bank sets a target rate or range for the fed funds rate it is adjusted periodically based on economic and monetary conditions overnight marketsthe fed funds market operates in the united states and runs parallel to the offshore eurodollar deposit market eurodollars are also traded overnight and the interest rate is virtually identical to the fed funds rate but the transactions must be booked outside of the united states multinational banks often use branches domiciled in the caribbean or panama for these accounts even though the transactions may be executed in u s trading rooms both are wholesale markets with transactions ranging from 2 million to well over 1 billion the fed funds ratesthe federal reserve uses open market operations to manage the supply of money in the economy and adjust short term interest rates this means that the fed buys or sells some of the government bonds and bills it has issued this increases or decreases the money supply and thus lowers or raises short term interest rates open market operations are carried out by the federal reserve bank of new york the federal funds rate fed funds rate is one of the most important interest rates for the u s economy as it affects broad economic conditions in the country including inflation growth and employment the federal funds rate is set in u s dollars and is typically charged on overnight loans the fed funds rate is thus the effective interest rate at which commercial banks lend reserves to one another on an overnight basis the federal funds rate is closely related to short term interest rates in the broader market so these transactions directly impact eurodollar and libor rates as well the federal reserve announces the effective fed funds rate at the end of each trading day which is the weighted average rate for all transactions in the market that day market participantsthe participants in the fed funds market include u s commercial banks u s branches of foreign banks savings and loan organizations and government sponsored enterprises such as the federal national mortgage association fannie mae and federal home loan mortgage association freddie mac as well as securities firms and agencies of the federal government 