Take a look at some of Tuesday's midday movers:
Chesapeake Energy fell on a downgrade from Sterne Agee citing concerns about valuation, near-term hedges and cash flow uncertainty.
Hain Celestial jumped on an upgrade from Longbow Research to "buy" following a survey of Whole Foods and Fresh Market. Longbow's survey showed positive demand and sales trends within the organic food sector. Whole Foods is the biggest customer for Hain Celestial.
Miner Cliffs Natural hit a new 52-week low and its lowest price in nearly four years as iron ore prices fell.
—By CNBC's Lori Spechler
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