Summary Box: China worries send commodities lower

CHINA CONCERN: Investors were spooked Friday amid talk that China might raise interest rates to combat inflation. That could also curtail strong growth in the country and dampen demand for basic materials including soybeans and copper.

COPPER DROP: Copper prices were hurt because China is the world's largest importer of the metal. Its price fell back below $4 a pound.

SOYBEANS SLIP: China has been a huge importer of U.S. soybeans this year, so concerns hit the crop especially hard. The price of a bushel of soybeans fell 5.2 percent.