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 Coherent (Nasdaq: COHR) fell nearly 12% in early trading, as investors appeared to want better guidance from the photonics specialist.

So what: Fiscal third-quarter results were solid if unspectactular. Revenue grew 26.5% to $210.9 million, while profit rose 25.8% to $0.83 a share. Analysts had been calling for $206.95 million and $0.83, respectively, according to data compiled by Yahoo! Finance.

Now what: But again, investors didn't care about the revenue beat. During its call with analysts, Coherent said fourth-quarter revenue could come in between $205 million and $212 million. Analysts are projecting $211.9 million. So by the numbers, there's virtually zero chance of Coherent beating estimates next quarter -- and on Wall Street, anything less than a beat is a miss. Do you agree? Disagree? Let us know what you think 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 in this article 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. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.