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 Delta Air Lines (NYSE: DAL) flew 10% higher today as investors cheered the airline operator's quarterly results and revenue forecast.

So what: While Delta's first-quarter loss widened to $318 million, or $0.38 cents per share, it was still less than the $0.50 per share loss that analysts were expecting. A sharply higher fuel bill was naturally the biggest culprit in the loss, but revenue-boosting fare hikes helped Delta offset some of the damage.

Now what: With Delta now forecasting double-digit revenue gains for the June quarter, the short-term skies look fairly smooth. In fact, fellow airliner US Airways (NYSE: LCC) is also up nicely today on impressive top-line growth, further confirming the early signs of strong summer demand. Of course, for most investors, sky-high oil prices -- not to mention the huge fixed-costs, labor unions, and cutthroat competition associated with the industry -- makes Delta a particularly poor long-term pick.

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

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Try any of our Foolish newsletter services free for 30 days.

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