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 China-based tutoring service provider Xueda Education Group (NYSE: XUE) look smart today, rising 10.4% on heavy trading in a generally upward trend.

So what: While dramatic on its own, this jump merely reversed a drastic sell-off as the markets closed yesterday: Xueda shares have gained a scant 2% since Friday's closing bell. Neither the fall nor the leap comes with much explanation.

Now what: That said, today has been a banner day for Chinese education stocks as sector rival ChinaCast Education (Nasdaq: CAST) also made a double-digit positive move today without much substance behind the bustle. All of this exciting action only serves to underscore just how volatile this sector can be. Xueda may have terrific growth prospects, but it's almost impossible to figure out which way the stock will jump next -- tread lightly, dear investor, for here be dragons.

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