Copper futures dropped more than 4% Wednesday, as mining giant BHP Billiton said it will cut 6,000 jobs amid falling demand for commodities. Copper for March delivery fell 7 cents, or 4.6%, to end at $1.43 a pound on the New York Mercantile Exchange. Gold for February delivery fell $5.10 to end at $850.10 an ounce on Nymex.
