The future role of Jean-Pierre Mustier, the 'fixer' brought in to salvage Société Générale's asset management arm, has been thrown into doubt following the merger with Crédit Agricole's fund management arm, which will create a French superpower dwarfing the rest of the country's investment management sector.

According to a joint statement by the two French banks, the two merged fund management arms will create the fourth largest asset management business in Europe and the ninth largest on a global scale.