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 DG FastChannel (Nasdaq: DGIT) fell as much as 27% and remain down more than 25% as of this writing, after the company missed second-quarter revenue estimates.

So what: The digital ad distributor said revenue came in almost $6 million short of Wall Street's consensus projection -- $67.9 million versus the $73.6 million analysts had been calling for, Reuters reported. GAAP profits improved 16% to $0.37 a share while non-GAAP earnings of $0.55 beat expectations by three pennies.

Now what: Like many Fools, I'm long DG FastChannel in Motley Fool CAPS, where the stock merits five out of five stars. There's no justification for this much selling when the company beat profit estimates by $0.03. As it now stands, the stock trades for roughly half the long-term earnings growth analysts expect -- a bargain by my math. Do you agree? Would you buy at these levels? Weigh in using the comments box below.

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