France’s financial regulator has called on the European Commission to "state the obvious" when it finalises a revised version of the EU's trading rulebook, amid concerns parts of the text are being interpreted differently across the continent.

The EU's executive body is finalising key aspects of Mifid II, a revision of the 2007 Markets in Financial Instruments Directive that includes new rules on payments for investment research, which have traditionally been bundled in with dealing commissions.