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 wireless-equipment specialist CalAmp (NASDAQ:CAMP) sank 10% today after its Q4 outlook missed Wall Street expectations.

So what: CalAmp's Q3 results -- EPS of $0.23 on revenue of $63.5 million -- managed to top estimates, but downbeat guidance for the current quarter is triggering concerns over decelerating growth going forward. Of course, the stock has been on fire over the past year, up more than 250% from its 52-week lows, so a small guidance hiccup shouldn't come as too big of a surprise.

Now what: Management now sees Q4 adjusted EPS of $0.19-$0.23 on revenue of $60 million-$63 million, below the consensus of $0.24 and $63 million. "CalAmp is on-track for a very strong second half of fiscal 2014," President and CEO Michael Burdiek reassured investors. Of course, when you couple today's small signs of slowing growth with the stock's forward P/E of 25, waiting for a wider margin of safety might be prudent.