Copper prices rose on Wednesday as a bright demand outlook and supply disruptions in some South American mines offset pressure from rising inventories.
Copper for delivery in May was up 0.91% by midday, with futures touching $4.1055 per pound ($9,031 a tonne) on the Comex market in New York.
Three-month copper on the London Metal Exchange rose 0.8% to $9,028 a tonne, while the most-traded May copper contract on the Shanghai Futures Exchange closed down 0.7% at 66,940 yuan ($10,298.46) a tonne.