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 Digital River (Nasdaq: DRIV) were off much as 13% on the tail (and the tale) of its fourth-quarter and full-year results, released after the bell yesterday.

So what: Although revenue and earnings met or exceeded management's guidance, investors cried a river -- presumably because of what The Associated Press called "a conservative outlook for 2011."

Now what: The provider of e-commerce tools runs a high-margin business that scales easily. It suffered a big blow when Symantec (Nasdaq: SYMC) -- which accounted for roughly a quarter of the company's revenues -- brought its e-commerce business back in-house. At the beginning of 2010, CEO Joel Ronning committed to replacing that revenue, and on yesterday's conference call he declared himself "pleased to report our revenue is back on track." With its more diversified base and strong position in the industry, Digital River is worth a look for diversified, risk-averse investors.

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Fool analyst Rex Moore owns no companies mentioned here. Digital River is a Motley Fool Rule Breakers selection. 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.