(6)Trading venues, approved publication arrangements (APAs) and investment firms have not interpreted the requirements related to the disclosure of post-trade transparency information to the public and the information to be provided to the European Securities and Markets Authority (ESMA) and competent authorities for the purpose of the transparency calculations consistently. As a result, such information is incomplete, inaccurate or inconsistent. This undermines the usability of such information and the quality and accuracy of the transparency calculations based on the submitted data. In order to promote the consistent application of the post-trade transparency requirements across the Union, it is necessary to further specify how details, such as price and notional amount, should be disclosed with regard to different financial instruments by trading venues, APAs and investment firms and for the reporting of reference data and quantitative data to ESMA and competent authorities.