In addition, throughout the period from 2013 to the present, national banking supervisors have been entrusted with the management of banks in order to agree on continuous timetables for the necessary improvements. From a prudential point of view, progress was mainly monitored through G-SIB self-assessment exercises – these exercises were carried out in early 2013 in a more anti-expected manner, with the aim of filling important gaps before 2016. From 2013, the Basel Committee also kept abreast of the progress made by G-SIBs in complying with the principles through its Standards Implementation Group (GIS). Figure 1 provides some details on the chronology. high regulatory requirements over time. Similarly, the ability to process data either manually or electronically is a prerequisite for all banking services. The automation of the processing of this raw material has led to the introduction of ATMs, credit/debit cards, electronic payments, self-service online/mobile models and high-frequency trading. Data attributes such as accuracy, completeness, confidentiality, integrity and availability are essential for the introduction and operation of these financial services in the market. In June 2012, the Basel Committee on Banking Supervision (BCBS) (also known as the Basel Committee) published a consultation paper entitled « Principles for effective risk data aggregation and risk reporting », which adds an additional regulatory requirement to the already overburdened regulatory sector and also raises a number of concerns for stakeholders. The purpose of this letter is to provide a brief, high-level overview of the basics of BCBS 239, given that this issue is currently more relevant and debated.