This paper discusses key findings of the detailed assessment of implementation of the European Central Bank (ECB) Observance of the Committee on Payment and Settlement Systems/International Organization of Securities Commission (CPSS-IOSCO) responsibilities of authorities for financial market infrastructures. The oversight framework of the ECB is comprehensive. The ECB has developed a wide-ranging oversight policy, including quantitative and qualitative criteria to identify, monitor, and remedy any potential systemic risks related to financial market infrastructures. It has also developed oversight standards covering a broad range of infrastructures, service providers, and payment schemes within the euro area.