
Copper prices fell below the 50 day moving average of 354.41 before rebounding to close at 357.35 in trading on Monday.

``At this stage we have no impact on our Antamina operations,'' Mark Lidiard, a London-based spokesman for BHP Billiton, said today in an e-mail. Melbourne, Australia-based BHP Billiton owns 33.75 percent of Antamina, Peru's largest copper mine. Xstrata Plc, based in Zug, Switzerland, holds a matching stake.
Copper closed the week at 359.30, and remains well above the 50 day moving average of 345.58China's imports of refined copper, anode and copper alloy in April stood at 304,672 tons.
That was down by 6.5 percent from March's record of 307,740 tons but exceeded expectations.
Nickel prices gained $1,800 to $50,850 a ton