New York - Wall Street stocks rose early on Wednesday as stronger oil prices lifted petroleum-linked shares even as Yum Brands and some other companies fell on disappointing earnings.
About 35 minutes into trade, the Dow Jones Industrial Average was at 16 946.09, up 155.90 points.
The broad-based S&P 500 rose 0.89% to 1 997.45, while the tech-rich Nasdaq Composite Index advanced 0.78% to 4 785.43.
Dow member ExxonMobil gained 1.6% and Marathon Oil rose 3.7% as US oil prices moved up toward $50 a barrel.
But Yum Brands, which owns the KFC and Taco Bell fast-food chains, sank 18.5% as it lowered its earnings forecast due to sluggish sales in China.
Agricultural seed giant Monsanto rose 1.9% as it announced plans to cut 2 600 jobs over the next 18 to 24 months due to weakening demand in the wake of lower commodity prices.
Mining and oil company Freeport-McMoRan jumped 8.0% after announcing it reached an agreement with activist investor Carl Icahn to appoint two Icahn associates to the company's board.
Software company Adobe Systems tumbled 5.8% as it projected 2016 earnings of $2.70 per share, well below the $3.19 projected by analysts.
Beer and spirits distributor Constellation Brands gained 2.8% as second-quarter net income rose 54.4% to $302.4m.
TJX, parent of TJ Maxx and other department-store chains, rose 1.4% as it announced that president Ernie Herrman was promoted to chief executive, replacing Carol Meyrowitz, who will become executive chairman.
Bond prices fell. The yield on the 10-year US Treasury rose to 2.07% from 2.04% on Tuesday, while the 30-year advanced to 2.91% from 2.87%. Bond prices and yields move inversely.