Markets were cautiously optmistic after Trump took a lighter approach to China on Monday. That sentiment lasted a day.

The President, who has suggested that the U.S. take on 50 percent ownership of TikTok, hinted that potential tariffs on China will be closely linked to whether such a joint venture is approved. “If China didn’t approve it,

U.S. President-elect Donald Trump and Chinese President Xi Jinping discussed issues including TikTok, trade and Taiwan in a phone call on Friday, just days before Trump takes office again promising tariffs that could ratchet up tensions between the world's two biggest economies.