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 Synaptics (NASDAQ:SYNA) plummeted more than 15% Friday after the company provided disappointing guidance following its solid fiscal first-quarter 2014 earnings report.

So what: Quarterly net revenue rose a whopping 75% year over year to $222.6 million, which translated to an adjusted net income of $45.9 million, or $1.31 per diluted share. For reference, both numbers beat analysts' expectations, which called for adjusted earnings of $1.23 per share on sales of $218.89 million.

However, Synaptics also stated that next quarter's revenue is expected to fall to the range of $192 million to $208 million, or well below average expectations for fiscal second-quarter sales of $209.35 million.

Now what: That's still an increase of 34% to 45% over last year's fiscal second quarter, but nervous investors certainly don't like to see year-over-year growth wane on any level. Even so, with shares currently trading at just 15.5 times last year's earnings, and 11.3 times next year's estimates, I think there's plenty of pessimism already priced into Synaptics stock. As a result, today's pullback could very well serve as a fantastic buying opportunity for patient long-term investors.

Fool contributor Steve Symington has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. 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.