Neil Danziger has also been banned from the industry after manipulating Japanese Yen Libor submissions at RBS.
The CFTC found traders at RBS joked about manipulating the USD ISDAFIX benchmark.
Trading ‘Cartel’ charged with rigging FX spot market face up to 10 years in prison.
The charge for cash used as initial margin for listed derivatives trades will affect around 60 clients.
Paul White banned from regulated activities after letting derivatives traders influence his Libor submissions.