(5)The complexity of the benchmarking exercise requires a progressive use of portfolios that refer to the internal approaches used to calculate risk-weighted exposure amounts for credit risk. For market risk, the portfolios used in benchmarking exercises of the Basel Committee on Banking Supervision (‘BCBS’) and of EBA in 2013 should be used as a starting point for developing the set of portfolios for the benchmarking exercise required by Article 78 of Directive 2013/36/EU, with only minor adaptations to maintain the portfolio validity. This will minimise the burden to institutions and competent authorities and avoid a duplication of efforts.