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 Chinese software and information technology services wrangler VanceInfo Technologies (NYSE: VIT) are having another tough day today, falling as much as 10.1% on fairly heavy volume.

So what: The company missed earnings expectations a whole week ago and never really stopped sliding. There's absolutely no news on which to pin today's decline other than an extension of that downward trend.

Now what: VanceInfo has now dropped more than 42% from yearly highs set in December, when the stock was one of the best performers on the market. Since then, VanceInfo's formerly high-octane earnings growth has come to a virtual stop due to shrinking gross margins and higher operating costs. The company may be a big name in the Chinese IT consulting market, but it seems obvious that competitive pressures from global giants including IBM (NYSE: IBM) and Hewlett-Packard (NYSE: HPQ) have made it tougher to grow quickly without sacrificing margins.

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

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