French market regulator Autorité des Marchés Financiers said it has fined former Société Générale investment banking head Jean-Pierre Mustier €100,000 ($122,565) for insider trading, but cleared former Société Générale non-executive director Robert Day.

In a decision published on its website, the AMF said that Mustier used his knowledge of the bank's situation, particularly valuations of collateralised debt obligations, to sell 6,000 Société Générale shares August 21, 2007 for a profit.