Longbow Upgrades PolyOne (POL) to Buy, Downgrades A. Schulman (SHLM) to Sell

An analyst at Longbow Research revised the firm's investment ratings on two stocks in the Chemicals sector Wednesday morning:

• upgraded PolyOne (NYSE: POL) from Neutral to Buy
  
• downgraded A. Schulman (Nasdaq: SHLM) from Neutral to Sell

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