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NEW YORK Concerns that China make take steps to slow its economic expansion sent commodities and materials stocks lower.China reported that its economy expanded 10.3 percent in 2010. Economists expect that China's central bank will increase interest rates to slow growth www.xenonhid.net.The decline in commodities Thursday was tempered by slightly better news in the U.S. job market. New unemployment applications unexpectedly fell last week.At the market close, www.stainlessclamp.com the Dow Jones industrial average is down 2 points, or less than 0.1 percent, to 11,823. The S&P 500 is down 2, or 0.1 percent, to 1,280. The Nasdaq composite is down 21, or 0.8 percent, to 2,704.Two stocks fell for every one that rose on the New York Stock Exchange www.rctoysmodel.com. Volume came to 1.2 billion shares.