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.
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.
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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