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.