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 skin-care products maker Nu Skin (NYSE:NUS) jumped 13% today, after a bullish third-quarter earnings report.

So what: Revenue roared ahead 23%, to $526 million, while EPS grew at a similar pace to $0.87 per share, well ahead of expectations of $0.77 cents. Growth was largely fueled by China, where sales increased 64%, to $137 million, and its South Asia region, which grew by 47%. The maker of anti-aging products also raised its full-year EPS forecast to $3.33-$3.37 from $3.16-$3.24, and increased revenue guidance.

Now what: Nu Skin's Asian growth numbers look especially promising and, considering that the stock is still trading at a P/E of 14, 23% top-line growth could make it an excellent buy. Look for analysts to boost their estimates in the wake of this report, which could send the price up even further.

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