The copper price has been surging in recent weeks, a fact that should be good news for BHP Billiton (BLT), which counts the metal as one of the four pillars of its commodities strategy.
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Unfortunately, the diversified miner has been less of a beneficiary than a contributor to that spike, after its failure to reach a new pay and benefits deal with workers at its Escondida mine resulted in a strike, cutting off the world's single-largest source of copper supply.