Take a look at some of Tuesday's midday movers:
Allergan - The Botox maker edged lower after hinting it's considering strategic alternatives as its defends itself from a hostile takeover from Valeant Pharmaceuticals International and Bill Ackman's Pershing Square.
Bristol-Myers Squibb - The drug manufacturer declined after saying it withdrew its U.S. marketing application for a treatment for hepatitis C.
Christopher & Banks - The women's apparel retailer dropped after cutting its third-quarter revenue forecast.
Coty - The cosmetics company rose after saying it made a binding bid for Chanel's Bourjois brand.
Deere - The agricultural-equipment maker fell, as did CNH Industrial after rival AGCO cut its third-quarter and 2014 outlook.
General Motors - The automaker declined after Morgan Stanley cut its earnings estimate.
GoPro - The maker of action cameras rose after Barclays hiked its price target.
International Business Machines - The technology company fell, as did Intel and Apple after Bernstein Research released an investor survey that found the trio as the best tech stocks to bet against.
Keurig Green Mountain - The coffee company rose after Goldman Sachs began coverage with a buy rating.
Rio Tinto - The iron-ore producer fell after Glencore said it was no longer interested in acquiring the company.
United Parcel Service - The shipper fell after saying it purchased international e-commerce enabler and logistics company i-parcel.
Wal-Mart Stores - The discount retailer edged higher after saying it would cut health benefits to some part-time workers.
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