
A trader works in the S&P 500 options pit at the Chicago Board Options Exchange on April 27, 2011 in Chicago. The Federal Reserve Open Market Committee has announced that the key fed funds rate remains unchanged at 0-0.25 percent and stated that it will continue its plan to stimulate the economy with low interest rates and will continue to buy up to $600 billion in U.S. Treasury bonds through the end of June. By Brian Kersey/Getty Images.