Stocks open slightly lower as trade worries, Italy weigh

U.S. stocks opened slightly lower Tuesday as some of the enthusiasm over a U.S.-Canada trade deal that sparked gains the previous session faded. Analysts said continued concerns over U.S.-China trade tensions and turmoil surrounding Italy's budget plans weighed somewhat on sentiment. The S&P 500 was off 0.1% at 2,922.78, while the Dow Jones Industrial Average traded with a minor loss of 4 points. The Nasdaq Composite was off 0.1%.

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