Fed chair vows to 'do all that I can' to boost weak U.S. economy

Reuters:  Federal Reserve Chair Janet Yellen vowed on Wednesday to "do all that I can" to boost a U.S. economy where unemployment is too high and inflation is too low.

"The economy continues to operate considerably short" of the central bank's objectives of full employment and stable prices, Yellen said at a swearing-in ceremony at the central bank in Washington.

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