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Byline: JONAH KERI
What looked like another day of heady gains turned to dust Monday as a late-day reversal sent Nasdaq stocks to a loss by the close. The tech-laden index fell 0.3%, while the Nasdaq 100 dropped 1.1%. Volume picked up for the fifth straight day, not a good sign in a down session.
Kos Pharmaceuticals plunged 3.39, or 14%, to 20.97. Volume exploded to 5 1/2 times its 50-day average level. UBS Warburg downgraded the stock to neutral from buy, citing valuation. That scuttled the stock's May 27 breakout and left it 22% off its high. The firm makes drugs to treat chronic cardiovascular and respiratory diseases.
Staying with drug makers, Sicor rose as high as 21.49 before turning tail. The maker of oncology drugs, particularly generic injectable drugs, closed down 1.25 to 19.89 on more than twice its normal trade. Merrill Lynch downgraded the stock to neutral from buy.
OmniVision Technologies also gave ground after a long, nearly uninterrupted run-up. The fabless semiconductor company, which makes single-chip image sensors that capture and convert images for cameras, surveillance systems and games, ...