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Corporate Summary

•    Rowan Cos. (NYSE:RDC) gained 9.7% to close at $33.99, the highest since August 9, 2011 after it  announced it had delayed moving its headquarters to the U.K. in an effort to stay on the S&P 500

•    Shares of McKesson Corp. (NYSE:MCK) rose 3.9% after being awarded a contract valued at a maximum of $4 billion a year by the U.S. Department of Veterans Affairs to supply treatment centers

•    Barnes & Noble, Inc.(NYSE:BKS) dropped 6.4% after the U.S. Justice Department sued Apple and five publishers over e-book prices

•    China Cord Blood Corp (NYSE:CO) surged 5.6% after private equity firm KKR & Co. L.P. (NYSE:KKR), said it had agreed to invest $65 million in the former to capitalize on China's rapidly growing healthcare industry

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Zacks #1 Rank Top Movers for Zacks #1 Rank Top Movers

Company Symbol Price %Chg
SIGNET JEWE… SIG 116.37 +7.72%
CHYRONHEGO… CHYR 2.72 +5.84%
US SILICA H… SLCA 70.72 +4.00%
MALLINCKROD… MNK 80.11 +2.32%
RF MICRO DE… RFMD 11.76 +2.31%