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 hotel operator 7 Days Group Holdings (NYSE: SVN) surged as much as 14% today after the company said it's expanding faster than expected.

So what: After yesterday's close, 7 Days Group said that it opened 231 hotels (net) in 2010, easily outpacing the 170 to 200 hotels that it had planned for. The faster pace for 2010 has the company excited about what's ahead as it now believes it will reach its target of having 1,000 hotels in operation and under development by the end of this year.

Now what: The faster pace of growth is good news for the company and investors as 7 Days Group looks to solidify its market position and start earning meaningful profits for its shareholders. The company appears to have done a very good job thus far of expanding while drastically improving its balance sheet -- currently it has almost no debt to speak of. Investors now just have to hope that the growth that's ahead can justify the price they are currently paying for the stock.

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Fool contributor Matt Koppenheffer does not own shares of any of the companies mentioned. You can check out what Matt is keeping an eye on by visiting his CAPS portfolio, or you can follow Matt on Twitter @KoppTheFoolor on his RSS feed. The Fool's disclosure policy prefers dividends over a sharp stick in the eye.