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 communications equipment maker Ciena (Nasdaq: CIEN) soared more than 21% in early trading after reporting a smaller-than-expected loss. CEO Gary Smith also told Barron's that he believes European customers won't cut capital spending projects.

So what: Third-quarter revenue rose 12% to $435.3 million while adjusted profits improved to $0.08 a share. Analysts were expecting an $0.08 per share loss on $443.25 million in revenue. Operational improvements appear to be taking hold.

Now what: Indeed, in the Barron's interview, Smith said higher-margin gear such as switches comprised a greater portion of sales. The resulting improvement in gross margin trickled all the way down to the bottom line. Is this turnaround sustainable? You tell me. Please weigh in using the comments box below.

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