Case C-459/18: Judgment of the Court (Seventh Chamber) of 17 October 2019 (request for a preliminary ruling from the Rechtbank van eerste aanleg te Antwerpen — Belgium) — Argenta Spaarbank NV v Belgische Staat (Reference for a preliminary ruling — Tax legislation — Corporation tax — Deduction for risk capital — Reduction of the amount deductible by companies with a permanent establishment in another Member State which generates exempt income under a double taxation convention — Article 49 TFEU — Freedom of establishment — Unfavourable treatment — No such treatment)