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.

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