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 shipping and logistics provider Hub Group (Nasdaq: HUBG) fell as much as 14% in early trading as third-quarter earnings came up short of estimates. The stock closed down roughly 10%.

So what: Analysts at Raymond James and Stifel Nicolaus downgraded shares of Hub Group on fears of limited upside, The Associated Press reported. The underlying business isn't a concern. Revenue soared 59% to $760.4 million while per-share profit improved 29% to $0.44 a share in Q3. Analysts were nevertheless looking for $0.46, according to data aggregated by Yahoo! Finance.

Now what: For the most part, the downgrades appear to reflect short-term thinking about risk. Maybe that's fair, but with the stock trading for marginally above long-term analyst estimates, today's sell-off may prove to be an opportunity for buy-to-hold investors. Do you agree? Disagree? Please weigh in using the comments box below.

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