Some foreing money market traders are also under investigation. They are also trying to identify the representatives of the two main supervisory bodies, the Bank of Italy and stock-market regulator Consob, responsible for ensuring the genuineness of the derivatives deals. They could now face charges of lack of proper oversight. MPS came under public scrutiny last week following revelations of previously undisclosed losses of 720 million euros as a result of at least two shady derivatives deals.
The scandal triggered a rush of criminal investigations and a political storm over the alleged interference of political parties in the banking sector.
The centre-left Democratic Party (Pd) has a big presence in the foundation that controls MPS, headquartered in its historical stronghold of Siena.