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 supplements supplier Herbalife (NYSE: HLF) fell more than 12% in early trading on worse-than-expected 2012 guidance. The stock closed down roughly 7%.

So what: Management told investors to expect $3.25 to $3.45 a share in profits next year, well below the $3.57 Wall Street had been projecting.

Now what: Interestingly, the guidance overshadowed an otherwise big Q3 beat. Revenue grew 30% to $895.2 million. Profits improved 38% to $0.87 a share. Analysts were expecting just $0.76 a share of profit on $845.2 million in revenue, according to data compiled by Yahoo! Finance. Which matters more: the beat or the miss? Would you buy shares of Herbalife at current prices? Please weigh in using the comments box below.

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Fool contributor Tim Beyers is a member of the Motley Fool Rule Breakers stock-picking team. He didn't own shares in any of the companies mentioned at the time of publication. Check out Tim's portfolio holdings and Foolish writings, or connect with him on Google+ or Twitter, where he goes by @milehighfool. You can also get his insights delivered directly to your RSS reader.

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