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The medical supply company beats estimates in the first quarter and issues a strong guidance for 2008.
DryShips, Zimmer Holdings, Ross Stores upgraded; United Therapeutics, Platinum Underwriters downgraded.
Still, day-to-day volatility and market-moving news are making it hard to predict the next swing.
Shares plunge 33.9% after the company disappoints with its fourth-quarter results.
Shares surge after the orthopedic-device maker handily tops profit estimates.
The market's direction is closely tied to the Market Volatility Index, which has yet to get jumpy.
An examination of some big-picture charts offers insights as to where the market is headed long term.
Caremark and Zimmer lead the industry in dumbness for 2007.
NCR, Silicon Laboratories and Pogo Producing upgraded; Community Health Systems and Zimmer downgraded.
Freddie's follies; Zimmer zapped; Vonage vexed; Timberland's ax; Harman hammered.
Zimmer, J&J and Stryker are among the five companies inking deals with U.S. prosecutors.
By 2010, Cramer said, Toyota will 'own the world,' but it might be a rough ride.
Jim Cramer responds to questions about Home Depot, Celgene and Credit Suisse v. Billing.
It's cheap, Cramer says, and he'll back up the truck under $50.
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