Opinion of the European Central Bank of 11 May 2018 on a proposal for a regulation of the European Parliament and of the Council amending Regulation (EU) No 1095/2010 establishing a European Supervisory Authority (European Securities and Markets Authority) and related legal acts; and on a proposal for a directive of the European Parliament and of the Council amending Directive 2014/65/EU on markets in financial instruments and Directive 2009/138/EC on the taking-up and pursuit of the business of Insurance and Reinsurance (Solvency II) (CON/2018/26)