Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of SunPower (Nasdaq: SPWRA) surged as much as 14% in early trading after the solar power specialist crushed fourth-quarter expectations and raised Q1 guidance.

So what: Revenue improved 71% to $937.1 million. Non-GAAP earnings more than doubled to $1.36 per share. Analysts were expecting $931.4 million and $1.05, respectively.

Now what: Those are excellent numbers, to be sure. Yet guidance seems to be what has captured the imagination of investors. SunPower raised its 2011 outlook to $2 and $2.20 per share on $2.8 to $2.95 billion in revenue, Reuters reports. An earlier forecast called for $1.75 to $2.05 a share on $2.65 to $2.85 billion in revenue.

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Fool contributor Tim Beyers is a member of the Motley Fool Rule Breakers stock-picking team. He didn't own shares in any of the companies mentioned in this article at the time of publication. Check out Tim's portfolio holdings and Foolish writings, or connect with him on Twitter as @milehighfool. You can also get his insights delivered directly to your RSS reader

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