The Federal Reserve injected $47.25 billion into US money markets today help ease tight liquidity.
The Fed said it had injected the money in three separate operations: $19.25 billion in a one-day operation, $20 billion in a six-day operation and $8 billion in a 14-day operation.
The US central bank typically buys billions of dollars worth of securities from major banks, pumping extra cash into the banking system.
The banks are then obliged to repurchase the securities at a later date.
The Fed, which conducts the operations, has injected hundreds of billions of dollars into the financial system since early August, when credit flows seized up due to problems linked to the distressed US mortgage market.
