Cloud-security company Qualys Inc. was Tuesday upgraded to outperform from neutral by analysts at Baird, who cited "today's expected sell-off" as a reason to get into the stock. In premarket trade, shares of Qualys were down 25% after the company late on Monday lowered its 2015 revenue guidance and posted a disappointing outlook. The Baird analysts noted that Qualys has several new products in the pipeline and argued that the prospects for expanding margins make an interesting investment case.
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