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What: Shares of identity theft protection technologist LifeLock Inc. (NYSE:LOCK) were down 13% at noon ET on Thursday after its full-year outlook disappointed Wall Street.

So what: LifeLock's Q4 results managed to top estimates -- earnings per share of $0.30 on revenue of $156.2 million vs. the consensus of $0.29 and $154.7 million -- but downbeat guidance for 2016 is forcing analysts to quickly recalibrate their near-term expectations. So while the company managed to post its 43rd consecutive quarter of sequential revenue growth, the subdued outlook suggests that competitive and economic headwinds will weigh on its growth rate going forward.

Now what: Management now sees full-year 2016 EPS of $0.71-$0.76 on revenue of $660 million-$670 million, versus the consensus of $0.77 and $676.8 million, respectively. "Our ability to deliver solid growth in a challenging quarter gives me great confidence in the future of LifeLock," said CEO Hilary Schneider. "We continued to expand our product offerings and build out our operations to enhance our position as the most trusted identity theft solution provider in the industry." Of course, with the shares now off more than 40% from their 52-week lows, Wall Street remains rather skeptical of management's ability to deliver. 

Brian Pacampara has no position in any stocks mentioned. The Motley Fool recommends LifeLock. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.