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 electronics specialist Rogers (NYSE: ROG) fell more than 14% in early trading after management issued disappointing fourth-quarter guidance. The stock closed down 9%.

So what: Third-quarter earnings came in better than hoped. Revenue grew more than 45% to $147.6 million. Profits climbed 54% to $0.85 a share. Analysts were looking for $148.4 million and $0.79 a share, respectively, according to data compiled by Yahoo! Finance.

Now what: Poor guidance torpedoed whatever goodwill Rogers would have enjoyed for good Q3 results. New CEO Bruce Hoechner said that "slowing demand" in wireless infrastructure and weakness in other markets would affect fourth-quarter results. His team now expects to deliver $0.43 to $0.53 in per-share earnings on $131 million to $138 million in revenue, well below the $0.67 and $140.1 million Wall Street had been calling for. Does this miss matter? Would you buy shares of Rogers 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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