UPDATE 1-China hikes anti-dumping duties on U.S. DDGS in final ruling
January 10, 2017 at 22:21 PM EST
BEIJING, Jan 11 (Reuters) - China has increased punitive tariffs on imports of a U.S. animal feed ingredient known as distillers' dried grains (DDGS) from levels first proposed last year, potentially escalating a trade spat between the world's two largest economies.