Copper, aluminum and nickel declined as much as 2.3 percent on concern Europe's debt crisis may spread, hurting demand for commodities.
Copper fell as much as 1.7 percent to $6,790 a metric ton before trading at $6,805. Aluminum lost as much as 1.3 percent to $2,057 a ton before trading at $2,058 and nickel slumped 2.3 percent to $21,700 before trading at $21,730.