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Midday movers: Allergan, CarMax, CBS & more

NYSE New York Stock Exchange traders markets
Scott Mlyn | CNBC

Take a look at some of Monday's midday movers:

Allergan - The Botox maker climbed after Actavis agreed to buy the company in a deal valued at $66 billion.

DreamWorks Animation SKG - The film studio declined after Bloomberg News and the Wall Street Journal reported its merger talks with Hasbro had ended without an agreement.

Merck & Co. - The pharmaceutical giant gained after the release of data that showed its cholesterol drug significantly lowered the risk of heart attacks and strokes in patients at high risk.

Regeneron Pharmaceuticals - The drug developer climbed after saying its experimental drug was effective in reducing cholesterol for those who couldn't take statins.

Celldex Therapeutics - The drug maker rallied after it announced positive results of its treatment for a specific type of brain tumor.

Yahoo - The search engine was among the companies leading the way as the S&P Tech sector rose to a 14-year high.

Zoetis - The animal-health company rose after saying it would purchase a portfolio of pet drugs from Abbott Laboratories for $255 million.

CarMax - The used-car retailer dropped after Morgan Stanley downgraded its shares to equal weight from overweight.

Petrobras - Brazil's state-owned oil company continued to fall amid a widening corruption scandal.

Lockheed Martin - The defense contractor fell on reports Israel would order for its fighter jets would be smaller than thought.

CBS - The network fell moved lower after Evercore cut its price target on its shares.

Amicus Therapeutics - The drug developer gained after announcing positive results on its experimental treatment for Fabry disease.

(See CNBC's Market Insider Blog)

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