Encore Medical ( ENMC) jumped 30% Monday following an announcement that the Austin, Texas, company agreed to be bought by private-equity firm Blackstone Group. After the deal closes, Encore will be privately held, and its shares will no longer be listed. The orthopedic-device maker is being acquired for $6.55 a share, a 36% premium to the stock's closing price of $4.81 on Friday. Investment research firm Jefferies & Co. downgraded the shares after the deal became known, saying an acquisition wasn't unexpected. Since the firm's May 2005 initiation of coverage of the stock with a buy rating, "we have continued to believe that the market has not recognized the true value of Encore''s franchise," wrote medical-devices analyst Ryan Rauch in a research report. Shares of Encore were up $1.47 to $6.28. Baxter International ( BAX) ticked up 0.6% to $36.99 after the company said it reached an agreement with the Food and Drug Administration on the steps it needs to take before returning its Colleague and Syndeo infusion pumps to the U.S. market. The FDA seized 6,000 of the devices last year amid reports that a defect could cause them to shut down during infusion therapy. "Given that we believe the company had/has significant issues with its quality assurance function, including documentation and reporting of product malfunctions, investors should not assume that this will be smooth sailing for Baxter, though it may prove the exception to the rule," William Blair analyst Ben Andrew wrote in a research report. WebMD ( WBMD) shares fell following its disclosure Friday that it misreported its increase in page views in the second quarter. The health-information provider said page views rose 22% from the year-ago quarter, not 25% as had been reported earlier in the day.