CNBC reports: "U.S. President Donald Trump "flip-flops" so much in his stance over trade and tariffs with China that it's difficult to know what stocks to buy and avoid, an economist and strategist told CNBC ahead of the next round of Sino-U.S. trade talks aimed at averting a trade war. "The president (Trump) has an uncanny habit of saying 'yeah, yeah we'll punish you' and then 'no, no we won't," Andrew Freris, chief executive of Ecognosis Advisory, told CNBC on Thursday... Freris' comments come as the U.S. and China are set to start another round of trade talks on Thursday. The atmosphere could be a little frosty given a war of words and threats over trade tariffs in recent weeks. Trump has criticized what he sees as unfair trade practices and threatened to impose up to $150 billion of tariffs on Chinese goods."