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 Israeli network gear builder Mellanox Technologies (Nasdaq: MLNX) surged 11.1% on more than three times the average trading volume.

So what: Mellanox just reported a great fourth quarter, utterly shocking all six analysts who follow it with beats on both the top and bottom lines. Management gives credit to strong market adoption of its high-speed Ethernet and InfiniBand products, and points to a slew of upcoming product releases that should keep the good times rolling.

Now what: You may have seen Mellanox and its products without realizing it: These components typically ship as part of servers and storage systems from household names such as IBM, NetApp, and Hewlett-Packard. Ever-increasing appetites for huge bandwidth feeds across the data center should keep Mellanox in the loop for years to come. A word of warning: As great as the results were, margins are under pressure all over the income statement. Perhaps the company should settle for a spell of slower revenue growth in order to capture stronger margins and fatter profits.

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

Fool contributor Anders Bylund holds no position in any of the companies discussed here. The Fool owns shares of International Business Machines. 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.