The Commission de Surveillance du Secteur Financier (CSSF) is responsible for the prudential supervision of credit institutions, professionals of the financial sector (investment firms, specialized PFS, support PFS), undertakings for collective investment, pension funds, SICARs, secularization undertakings issuing securities to the public on a continuous basis, regulated markets and their operators, multilateral trading facilities, payment institutions and electronic money institutions. It also supervises the securities markets, including their operators.
The CSSF is also the competent public oversight authority for the audit profession. The CSSF is based in Luxembourg.

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