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 digital optical networking company Infinera (Nasdaq: INFN) slumped as much as 10% after the company reported disappointing first-quarter results.

So what: For the quarter, Infinera recorded a loss of $0.10 (excluding one-time items) on a 13% rise in revenue to $104.7 million. Although the loss was $0.02 smaller than Wall Street had expected, revenue came in $1.1 million lighter than the consensus. Non-GAAP gross margins also dipped during the quarter to 40% from 48% in the year-ago period.

Now what: What's really disconcerting about today's report is how little was said regarding the drop in margins outside of CEO Tom Fallon's comment: "Activity in our first quarter reflected demand from our customers for both our existing and next generation platforms." That doesn't help much and it's definitely not giving investors any confidence in the stock. As losses continue to mount, I'd suggest avoiding Infinera altogether.

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