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: In trading today, shares of communications security firm VirnetX Holding (AMEX: VHC) moved as much as 13% above last night's closing price, bouncing off an early bottom to move 20% in intraday trading.

So what: The company posted a third-quarter report with the Securities and Exchange Commission on Monday night, but did not follow up with a press release. Today's massive price jump and yesterday's late-action drop of more than 16% are delayed reactions to this report as investors stumbled across new information outside the traditional news channels.

Now what: VirnetX landed a $200 million patent license payment from Microsoft (Nasdaq: MSFT) in the previous quarter, but booked no new revenue this time around, which explains the panicked drop. Today's bounce brings the stock back to a 652% gain over the past year, most of which came after that Microsoft payment. VirnetX has patent infringement lawsuits outstanding against Cisco Systems (Nasdaq: CSCO) and Apple (Nasdaq: AAPL) among other tech luminaries, and hopes to land another payday or two in the near future. I'm no fan of patent-trolling operations like this, but can't deny that the strategy has paid off handsomely so far.

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

Fool contributor Anders Bylund holds no position in any of the companies discussed here. Microsoft is a Motley Fool Inside Value recommendation. Apple is a Motley Fool Stock Advisor selection. The Fool has written calls (bull call spread) on Cisco Systems. Motley Fool Options has recommended a diagonal call position on Microsoft. The Fool owns shares of Apple and Microsoft. 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 is investors writing for investors.