Copper prices are declining on Friday after an active three-day growth, according to data from trading floors.

The cost of May copper futures on the Comex exchange fell 0.18% to $ 4.2175 per pound.

On the London Metal Exchange (LME), the cost of a ton of copper for delivery in three months at the end of Thursday's trading increased by 2.31%, to $ 9,284, aluminum - by 0.67%, to $ 2,339, zinc - by 1.47%, up to $ 2864.5 per ton.