. ( b ) represents the net notional amount of protection purchased and sold through credit derivatives used to manage both performing and nonperforming wholesale credit exposures ; these derivatives do not qualify for hedge accounting under u.s . gaap . excludes the synthetic credit portfolio . for additional information , see credit derivatives on pages 158 2013159 , and note 6 on pages 218 2013227 of this annual report . ( c ) excludes assets acquired in loan satisfactions