Business and Personal Finance Dictionary

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• FEDERAL FUNDS RATE
  
  The interest rate at which banks and other depository institutions lend money to each other, usually on an overnight basis. The law requires banks to keep a certain percentage of their customer's money on reserve, where the banks earn no interest on it. Consequently, banks try to stay as close to the reserve limit as possible without going under it, lending money back and forth to maintain the proper level. Like the federal discount rate, the federal funds rate is used to control the supply of available funds and hence, inflation and other interest rates. Raising the rate makes it more expensive to borrow. That lowers the supply of available money, which increases the short-term interest rates and helps keep inflation in check. Lowering the rate has the opposite effect, bringing short-term interest rates down.
  
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