UPDATE: Oppenheimer Downgrades Fiserv to Perform on Valuation

In a report published Wednesday, Oppenheimer analyst Glenn Greene downgraded the rating on Fiserv (NASDAQ: FISV ) from Outperform to Perform. In the report, Greene noted, “Encouragingly, sales grew 25% Y/Y and management now believes synergy targets for the Open Solutions acquisition could prove conservative. Following strong appreciation in FISV