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 data management expert CommVault Systems (Nasdaq: CVLT) look smart today, rising as much as 11.7% on heavy trading volume.

So what: Fourth-quarter sales vaulted 22% year-over-year to $90 million along with stronger margins, which added up to an analyst-stumping bottom-line performance. The stock has now gained 88% over the last year.

Now what: CommVault is holding its own against much larger rivals EMC (NYSE: EMC) and Symantec (Nasdaq: SYMC). Management claims to be taking market share from the incumbent powers and plans to keep doing it, too. CommVault's solutions appeal to large-scale enterprises in particular, as giant orders made up the bulk of this quarter's outperformance.

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