US copper extends gains

Copper added to its session gains in late trade on Wednesday, buoyed after the US Federal Reserve statement left interest rates unchanged and said it would keep its $600 billion bond-buying plan intact. "The economic recovery is continuing, though at a rate that has been insufficient to bring about a significant improvement in labour market conditions," the Fed said in a statement.
COMEX March copper on the New York Mercantile Exchange peaked at $4.29 per lb in electronic business, about a half percent higher than its settlement at $4.2670 per lb.