On the upside
Potash (NYSE: POT) raised its first quarter earnings outlook as demand surged.
Fourth quarter earnings for Aeropostale (NYSE: ARO) climbed to top analyst estimates prompting upgrades.
Cliffs Natural Resources (NYSE: CLF) announced a May 14, 2010 redemption date for rights accompanying outstanding stock under the company's Shareholder Rights Plan.
On the downside
Pacific Sunwear (Nasdaq: PSUN) widened fourth quarter losses as sales dropped.
Cytori (Nasdaq: CYTX) blamed increased costs widening fourth quarter losses more than expected.
CF Industries (NYSE: CF) will pay approximately $4.7 billion to acquire Terra Industries (NYSE: TRA).
