The U.S. government has imposed anti-dumping duties of 31%-250% on Chinese solar imports, a source tells Bloomberg. The duties are the result of an investigation into whether Chinese firms, backed by government subsidies, have been selling modules below cost to drive out competition. First Solar (FSLR +7.2%) and SunPower (SPWR +13.6% - previous) are rallying on the news, while some (though not all) Chinese vendors are selling off: YGE -11.8%. HOKU -8.8%. LDK -3.9%.