This special issue aims to examine whether there is an enduring politicization in the European Union (EU) “Better Regulation” agenda despite the emphasis on neutral evidence-based policy making. Our article addresses this overarching research question by focusing on the use of stakeholder consultations in the case of financial sector governance, particularly, the amended Markets in Financial Instruments Directive (MiFID II). We show that calibrating key provisions in MiFID II, such as those concerning knowledge and expertise, is not a simple exercise in rational problem definition and policy design. The provisions examined in this article have important repercussions for financial sector firms’ business strategies and operations. Thus, inve...