The central bank says it reduced the federal funds rate, the interest that banks charge each other, to a range of zero to 0.25 percent. That is down from the 1 percent target rate in effect since the last meeting in October.
Federal Reserve Chairman Ben Bernanke and his colleagues also pledged to use "all available tools" as they struggle to contain a financial crisis that is the worst since the 1930s and a recession that is already the longest in a quarter-century.
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