Roth Capital downgraded PTC Therapeutics (NASDAQ: PTCT) from Buy to ...

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Analyst PT Change Downgrades

PTC Therapeutics (PTCT) Reports Q1 Loss Per Share of $1.15May 4, 2015 5:02 PM PTC Therapeutics Reports First Quarter 2015 Financial Results and Provides Corporate UpdateMay 4, 2015 4:05 PM