Shares of coal producers were mixed worldwide Tuesday. Arch Coal and Peabody Energy surged 8.43% and 4.31% respectively in New York Tuesday morning, even though crude oil dropped to below US$63 per barrel. Earlier in Asia, Shenhua, one of the world’s largest producers, lost almost 3% in Hong Kong. Indonesian coal producers, meanwhile, suffer from almost 20% fall of coal reference price for December 2014.To subscribe please click here