KeyStock is a financial service broker operated by Nuntius Brokerage & Investment Services S.A. a financial services company authorized and regulated by the Hellenic Capital Market Commission (HCMC). It was established in 1991 and is domiciled in Athens Greece. Nuntius Brokerage & Investment Services S.A. is a member of Athens Stock Exchange and of the Athens Stock Exchange Members```` Guarantee Fund. It is also MIFID legislated and licensed and is a markets.com brand.