Shares of coal producers ended significantly lower in the past few trading days. Arch Coal and Peabody Energy dropped 4.71% and 5.33% respectively in New York Friday, while BHP Billiton and Rio Tinto lost 2.9% and 4.3% in Sydney this morning. China Coal Energy also ended lower by 2% in Hong Kong last Friday, while Whitehaven Coal down almost 4% in Sydney this morning.

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