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: Travel coupons wrangler Travelzoo (Nasdaq: TZOO) soared 11.4% over Monday's close price, or an even more impressive 13.7% from intraday lows, despite having no news of its own to report.

So what: But of course, the big talk of the day was Google (Nasdaq: GOOG) talking up Travelzoo rival Groupon to prepare a nice, juicy buyout. If Groupon is worth something like $5 billion to $6 billion, as the rumor mill would have it, that would put a premium on Travelzoo's shares as well.

Now what: Buyout chatter can be a powerful price catalyst. Pair that with a massive short position -- 31% of Travelzoo's float was sold short as of Nov. 15 -- and you have the makings of an impressive pop. But if the Groupon deal comes to pass as expected and nobody goes a-courting Travelzoo, be mindful of the effervescent effect wearing off before you take your profits.

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

Fool contributor Anders Bylund holds no position in any of the companies discussed here. Google is a Motley Fool Inside Value recommendation. Google is a Motley Fool Rule Breakers pick. The Fool owns shares of Google. 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.