Schering-Plough stock rose 8% the trading day before the deal plan was announced and 14% the day of the announcement.
WSJ: U.S. Pursues Sweeping Insider-Trading Probe
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In fact, Schering-Plough's stock has not even held onto the gains it made on December 24, after announcing that it had secured the Clarinex approval Friday night.
FORBES: Magazine Article
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Schering-Plough (SGP, 39) stock is down 35% from its 12-month high amid bad publicity over quality-control slip-ups at its factories, which lopped 5% from first-half earnings.