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A truck moves a shipping container at Qingdao Port on January 14, 2019 in Qingdao, Shandong Province of China.
Apple shares more than 1 percent after Cowen initiated coverage of the company with an outperform rating and a $ 220 price target. Cowen cited potential long-term upside from Apple's services business
Snap, meanwhile, rallied more than 6 percent after BTIG analyst Richard Greenfield – a longtime skeptic of the social media company – upgraded the stock to buy for the first time. "Performance advertisers are laser focused on return and investment (and spend more) where they see a compelling return," he said, noting the stock could rise 50 percent in the next 12 months.
Elsewhere, General Electric seesawed the industrial giant issued-than-expected earnings guidance for 2019. The stock initially fell around 4 percent in the premarket before turning around to trade 1.3 percent higher.
—CNBC's Sam Meredith contributed to this report.