Asian shares tumble after Trump throws US-China trade deal into jeopardy

US President Donald Trump has shocked investors by threatening to sharply raise tariffs on Chinese imports. In a pair of tweets on Sunday, Trump said that import duties on some $200 billion worth of Chinese goods would be raised from 10% to 25% this Friday, and that the punitive tariff would also be imposed on other products "shortly". The sudden move comes just days after Washington said the ongoing trade talks with Beijing were going well.