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 InterDigital (Nasdaq: IDCC), a digital wireless technology specialist, surged as much as 15% in early trading before closing up more than 13% for the day. The stock rallied on news that Samsung could make a bid for its patents.

So what: And Samsung isn't the only one. Bloomberg reports that Apple (Nasdaq: AAPL) and Google (Nasdaq: GOOG) are also looking at InterDigital's portfolio, touching off speculation that there could be a bidding war. It wouldn't be surprising. Nortel's patents fetched billions recently.

Now what: But a rumor is still a rumor until proven true. Here's hoping this one is -- because if it isn't, speculators who bought in today could be in for a whipping now that the stock trades for more than twice the long-term growth rate analysts expect. Do you agree? Disagree? Weigh in using the comments box below.

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Fool contributorTim Beyers is a member of the Motley Fool Rule Breakers stock-picking team. He owned shares of Apple and Google at the time of publication. Check out Tim'sportfolio holdings andFoolish writings, or connect with him on Google+ or Twitter, where he goes by @milehighfool. You can also get his insightsdelivered directly to your RSS reader.

The Motley Fool owns shares of Google and Apple.Motley Fool newsletter services have recommended buying shares of InterDigital, Google, and Apple and creating a bull call spread position in Apple. Try any of our Foolish newsletter servicesfree for 30 days. We Fools don't all hold the same opinions, but we all believe thatconsidering a diverse range of insights makes us better investors. The Motley Fool has adisclosure policy.