US copper futures were lower at the open on Friday as investors were seen pocketing profits following an almost 8 percent week-long rally in the red metal, sources said.
By 10:31 am EDT (1431 GMT), copper for May delivery was down 3.05 cents at $2.6160 a lb, on the New York Mercantile Exchange's COMEX division, after hitting an eighth consecutive life-of-contract peak in overnight electronic trade, the latest one at $2.6570.
Spot April was trading down 1.95 cents at $2.6570, after dealing from $2.6550 to $2.6750.
On Thursday, the contract set an all-time spot record at $2.6770. COMEX copper volume at 10 am was estimated at 8,000 lots.