Copper futures ended higher on Tuesday with optimism about US economic recovery and after the US Labour Department reported that job openings hit 9.3 million in April, a record high and more than 1 million above expectations.
Copper futures for July delivery gained $0.0295 to settle at $4.5560 a pound on the Comex metals division of New York Mercantile Exchange. Copper on the London Metal Exchange was up 0.64 percent at $9,964 a ton.