
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.