LME copper is subdued after bearish comments on the US economy by Federal Reserve chairman Ben Bernanke raised concerns about demand, says a broker. "The comments stopped copper in its tracks and put a halt to its recent gains," he adds. Notes an uncertain outlook for the US housing market and developments in the subprime mortgage market have raised worries over the country's economic health. LME copper, a key indicator of economic activity, is last at $6,667/ton, steady in Wednesday's range.