Copper price set to fall amid high output. By Jack Farchy in Santiago

Copper production is rising at the fastest rate in a decade, prompting investors to bet on a price collapse. The price of copper is key to the profitability of the large mining companies such as BHP Billiton, Anglo American and Freeport McMoran, as well as for the economy of Chile, which derives more than one eighth of its GDP from the metal, and other countries such as Mongolia and Zambia.

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