Judgment of the Court (Sixth Chamber) of 28 September 2023.#QI and Others v European Commission and European Central Bank.#Appeal – Action for damages – Economic and monetary policy – Restructuring of Greek public debt – Private sector involvement – Mandatory exchange of State bonds governed by Greek law – Collective action clauses – Activation – Damage relating to the reduction of the face value of the government bonds exchanged – Principle of proportionality.#Case C-262/22 P.