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 fleet vehicle fuel card provider FleetCor Technologies (NYSE:FLT) surged 14% today, after its quarterly results and outlook topped Wall Street expectations.

So what: FleetCor's fourth-quarter results -- EPS of $0.82 on revenue of $202.6 million versus the consensus of $0.75 and $178.7 million -- and full-year outlook were so strong, that analysts have no choice but to raise their valuation estimates, yet again. Management cited continued international expansion, as well as lower wholesale fuel costs for the positive report, giving Wall Street plenty of optimism over profitable growth going forward.

Now what: Management now sees full-year adjusted EPS of $3.61-$3.69, well above Wall Street's view of $3.40. Chairman and  CEO Ron Clarke said in a statement:

We are also well positioned to kick off 2013 as we have nearly $1 billion in liquidity to continue our global business development efforts.

Of course, with the stock now up a whopping 85% over just the past six months, and trading at a P/E of around 30, much of that bullishness might already be baked into the valuation.

Interested in more info FleetCor? Add it to your watchlist.

Fool contributor Brian Pacampara has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. 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 has a disclosure policy.