BEIJING (Reuters) -China's commerce ministry initiated an anti-dumping investigation into pecans imported from the United States and Mexico on Thursday, signalling more global trade tensions and increased friction with the two northern American nations. Beijing's move came as Mexico proposed to raise tariffs on goods across multiple sectors including textiles, steel and automotive from China and other countries, and as China and the U.S. eye further talks in a bid to ease their trade dispute. The inves ...