The Federal Reserve said it will pump fresh stimulus if necessary into the weakening economic expansion to boost growth and reduce an unemployment rate that’s been stuck at 8 percent or higher for more than three years.

The Federal Open Market Committee “will provide additional accommodation as needed to promote a stronger economic recovery and sustained improvement in labor market conditions in a context of price stability,” it said today in a statement at the end of a two-day meeting in Washington. “Economic activity decelerated somewhat over the first half of this year.”