A 64-year-old man was arrested yesterday by the City of London Police Economic Crime Directorate on suspicion of money laundering and providing false information in connection with suspected insider dealing.
The arrest was related to an FSA ongoing investigation into insider dealing.
In May last year five men and one woman were also arrested as part of this investigation.
Following questioning under caution by FSA staff, the man arrested yesterday was released on police bail pending further enquiries.
Following the arrest a premises in Potters Bar was also searched.
The FSA says no further details can be confirmed and the investigation is ongoing.
The regulator is currently prosecuting 11 other individuals for insider dealing.