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 fuel services expert World Fuel Services (NYSE: INT) have seen some high-octane action today, jumping as much as 10.6% on higher than average trading volume.

So what: The company's fourth-quarter report easily bludgeoned analyst estimates, driven by strength in its land-based services. The stock has returned a dividend-adjusted 58% over the last year and a mindblowing 1,840% in the last decade.

Now what: Even after all those tremendous gains, fellow Fool Rex Moore still sees a deep value in this stock. World Fuel's margins are vanishingly thin, but the company processes a massive and growing volume of business, which adds up to tremendous profits. If the company could widen those margins just a little bit, the potential gains would be epic.

Interested in more info on World Fuel Services? Add it to your watchlist.

Fool contributor Anders Bylund holds no position in any of the companies discussed here. 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.