Matolcsy was taken to the Central Chief Prosecution Office for Investigations. He led the National Bank of Hungary for 12 years until 2025.
His lawyer, Pál Bátki, told newspaper Telex that his client is suspected of the felony of financial fraud causing significant financial loss and the misdemeanour of using a forged private document.
The prosecution office confirmed it was conducting coordinated operations at several locations as part of an investigation into suspected breach of trust causing particularly significant financial loss. Details were expected to be released later on Wednesday.
The current leadership of the central bank and the State Audit Office have filed criminal complaints concerning the bank's foundations. The foundations, established under Matolcsy in 2014 and merged in 2019, managed nearly 500 billion forints (over €1 billion) through asset manager Optima Investment. The State Audit Office described an opaque network of companies and investments, serious management failings, and suspected criminal offences.
Matolcsy was questioned as a suspect in a separate case in September over alleged abuse of office involving pressure on Erste Bank Hungary. He denied those allegations. In May, parliament established an inquiry committee into central bank abuses, and authorities seized cash and securities worth 91.8 billion forints. Matolcsy has consistently denied wrongdoing regarding the management of the funds.