Wall Street shares lost ground at the open, having been higher yesterday, with the Dow Jones Industrial Index down over 20 points.
The tech heavy Nasdaq index lost almost 13 points at 6,440. The broader-based S&P 500 shed 2.56 at 2,504.
In Toronto, the TSX shed 5.33 points to stand at 15,614.
In the oil market, US crude lost 0.77% to US$52.50 a barrel.
In companies, Abbvie Inc ( NASDAQ:ABBV) added 6.31% to US$90.09 and was top gainer on S&P 500 after Amgen Inc (NASDAQ: AMGN) and the group said earlier, that they had reached a settlement over Amgen‘s biosimilar rival to Abbvie‘s blockbuster drug Humira.
Western Digital Corp (NASDAQ:WDC) was the big loser, down 3.09% to US$85.98.
Blackberry Ltd (NASDAQ:BBRY) shares added 14.63% to US$10.58 as software sales hit a record and second quarter numbers were far better than expected.
US shares in Wall Street are seen starting lower after a higher finish yesterday. Several stocks are in play, including a new float.
In focus will be Roku (NASDAQ:ROKU), the streaming TV and media firm, which makes its market debut today in New York on the Nasdaq index.
In doing so, it plans to sell shares worth US$219mln of shares, priced at US$14 each, valuing the group at US$1.3bn.
Meanwhile, Blackberry Ltd (NASDAQ:BBRY) shares added 7.48% to US$ 9.92 after hours as the Canadian smartphone giant announced second quarter numbers, which beat estimates.
The group for the three months reported revenue of US$249mln, which was higher than the US$221mln that had been expected.