Article 64 TFEU must be interpreted as meaning that national legislation, such as that at issue in the main proceedings, which provides for flat-rate taxation of the income of holders of units in a non-resident investment fund when the latter has not fulfilled certain statutory obligations constitutes a measure which relates to movement of capital involving the provision of financial services within the meaning of that article. Article 64(1) TFEU sets out an exhaustive list of capital movements to which Article 63(1) TFEU is liable not to apply.