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: Electronic manufacturing service company Plexus (Nasdaq: PLXS) fell 10% today after the company gave weak second- and third-quarter outlook.

So what: In the first quarter, the company beat expectations slightly with earnings per share of $0.61 and revenue of $565.8 million. But the market wasn't focused on the first quarter and instead saw second-quarter revenue of $540 million to $570 million and adjusted earnings per share of $0.53 to $0.58, a little lower than it would like.

Now what: Two programs with Coca-Cola have seen a "significant" delay, and investors had counted on that bump to boost results. With shares in free fall, you might think the world is ending, but profit did grow 40% from last year, and the stock is only trading at a forward price/earnings ratio of 10.0. The next two quarters may not be as good as expected, but this Fool likes the value shares are giving right now.

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