Trump 'flip-flops' so much over China and trade it's hard to pick stocks, economist says

President Donald Trump “flip-flops” so much on his stance over trade and tariffs with China that it’s difficult to know what stocks to buy and avoid, an economist told CNBC ahead of the next round of Sino-U.S. trade talks aimed at averting a trade war.

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Chinese President Xi Jinping and U.S. President Donald Trump attend a welcoming ceremony November 9, 2017 in Beijing, China.