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 security software specialist VirnetX (AMEX: VHC) surged as much as 13% in intraday trading today on above-average volume.

So what: The fuel for today's double-digit surge seems to be an extremely bullish Seeking Alpha article on VirnetX, in which contributor Dustin Moore taps the stock as a potent play on 4G security. I've highlighted the company as an interesting bet for its current patent suits against Cisco (Nasdaq: CSCO) and Apple (Nasdaq: AAPL) in the past, but Moore explains that VirnetX's real value -- worth "billions" -- lies in the 4G foundation it laid out many years ago.

Now what: I wouldn't be so quick to ride this latest wave of upward momentum. VirnetX is certainly intriguing, but as our resident tech expert Anders Bylund noted last week, the stock's crazy swings -- often based on no real news -- are just too wild for most investors to handle. While Moore brings up several bullish points, it's hard to believe that the company is legitimately worth 13% more today than it was yesterday.

Interested in more info on VirnetX? Add it to your watchlist.

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Apple is a Motley Fool Stock Advisor, and Motley Fool Options has recommended a bull call spread position on it. The Fool owns shares of and has written puts on Apple. Try any of our Foolish newsletter services free for 30 days.

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