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: Business-information-technology specialist Unisys (NYSE: UIS) saw its shares plunge a nasty 20% in early Tuesday trading after posting lower-than-expected quarterly results.

So what: After three consecutive quarters of solid growth, the decline in demand for Unisys' ClearPath servers seems to have caught investors off guard. The company's third-quarter profit fell 54% to $28.3 million, or $0.65 a share, which was well below the average analyst estimate of $0.86 a share.

Now what: Being greedy when others are fearful is often the most profitable thing to do, but now simply isn't the time to do it. While Unisys has made some decent cost-cutting strides over the past few years, a lack of differentiation and continuing top-line declines remain big concerns for shareholders. With blue-chip consulting foes such as Accenture (NYSE: ACN), IBM (NYSE: IBM), and Hewlett-Packard (NYSE: HPQ) available at reasonable prices, taking a turnaround bet on Unisys just doesn't seem worth it.

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Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Accenture is a Motley Fool Inside Value pick. The Fool owns shares of IBM. Try any of our Foolish newsletter services free for 30 days.

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