Prosecutors had alleged there was a conflict of interest in his 2009 appointment as head of France's second-biggest retail bank and his position advising former president Nicolas Sarkozy.

Perol, who chairs the management board of BPCE as well as the supervisory board of investment bank Natixis, had previously been cleared of wrongdoing in September 2015.

(Reporting by Michel Rose; editing by Richard Lough)