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 AVG Technologies (NYSE: AVG) have popped today by as much as 14% after the company reported earnings.

So what: Revenue in the fourth quarter totaled $95.2 million, which was shy of the $96.4 million consensus estimate. The good news is that the non-GAAP earnings per share of $0.32 was well ahead of the $0.26 per share that the Street was expecting, showing that the company's efforts to optimize costs are paying off.

Now what: AVG also offered up rather rosy guidance. Full-year sales are expected to be $408 million to $420 million, which crushes the consensus estimate of $403 million. AVG sees adjusted earnings per share of $1.68 to $1.88 for 2013, also well ahead of the $1.44 per share in adjusted profit that analysts were modeling for. At the end of the year, AVG boasted a user base of 146 million.