UPDATE: Stock market trims gains as trade tensions cool

By Anora M. Gaudiano and Barbara Kollmeyer, MarketWatch
China to reduce import duties on passenger cars
U.S. stocks were struggling to hold on to opening gains on Tuesday, as investors remained cautious about trade tensions between the U.S. and China despite recent signs of easing on both sides.
Read: Meet ‘green gold’ — and the stock for betting on it (http://www.marketwatch.com/story/meet-green-gold-and-the-stock-for-betting-on-it-2018-05-22)
What are markets doing?
The S&P 500 rose 2 points,…

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