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 datacenter operator Terremark Worldwide (Nasdaq: TMRK) jumped more than 12% overnight thanks to a strong earnings report backed by equally firm guidance.

So what: The stock has now gained 52% in six months and 74% over the past year. That's a remarkable performance when you consider that the company actually missed analyst targets in four of the past six quarters.

Now what: The growth story Terremark is telling is very different from the weakness reported by head-to-head rival Equinix (Nasdaq: EQIX). Server hosting and network management services can be very profitable when done right -- or a terrible business when management can't hold onto its customers. Terremark is doing just about everything right at the moment, and it shows in the stock chart.

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