The Federal Reserve has cut its key interest rate from 1.5% to 1% in a widely expected move, as it aims to avoid a possible US recession.
Earlier this month the Fed cut rates from 2% to 1.5% in an emergency move, which was co-ordinated with five other central banks.
But the move did not boost US markets, with the Dow and S&P 500 closing down.
Interest rates have been slashed since September 2007, when the federal funds rate stood at 5.25%.
