Copper lost more than 1 percent of its value and ended near session lows on Wednesday, hit by fears of sustained weakness in industrial demand after data showed a further deceleration in global factory growth. In New York, the July COMEX contract dropped 7.10 cents to settle at $4.1065 per lb, near the lower end of its $4.0970 to $4.1970 session range.
"The fact that we're a little bit weaker is a reflection of the weaker (manufacturing figures) which have ignited people's concerns about a slowdown in activity in China," analyst Gayle Berry of Barclays Capital said.