The Dow Jones Industrial Average was up 17.79 points or 0.07 per cent to 25 970.27. The S&P 500 dipped 9.09 points or 0.31 per cent to 2 887.63 Xinhua news agency reported.
The Nasdaq Composite Index decreased 83.17 points or 1.03 per cent to 8 008.07.
The Dow managed to reverse early losses underpinned by rallying Caterpillar and Walmart stocks. Shares of both companies rose about 1.5 per cent around mid-day.
Four of the 11 primary S&P 500 sectors traded lower with technology leading the laggards.
Major tech shares dropped weighing on the Nasdaq with Twitter and Netflix among the worst performers. Shares of the companies fell 4.88 per cent and 4.30 per cent respectively at mid-day trading.
Investors also kept a close watch on another round of US-Canada trade talks which is set to take place on Wednesday.
The US and Canada failed to secure an agreement to replace the current North American Free Trade Agreement by last Friday s deadline imposed by the US government.
--IANS pgh/
