MANUFACTURING WOES: Copper prices fell after two new surveys offered more evidence of a manufacturing slowdown in China and Europe. Investors worry that could mean reduced demand in the months ahead.
DEBT TALKS: Commodities were mixed overall as negotiations continued over debt problems in the United States and Europe. Investors have been concerned that a failure to solve the problems could affect global demand for basic materials.
HEAT WAVE: Corn prices fell slightly as a weekend forecast called for light rain in parts of the Midwest that have been caught in the nation's heat wave.