(11)For the assessment of market risk, back-testing, based both on hypothetical and actual changes in a portfolio's value, is already required to be conducted on a daily basis for the end-of-day positions of the whole portfolio, as set out in Article 366(3) of Regulation (EU) No 575/2013. The number of over-shootings has to be communicated to competent authorities and is regularly used to assess model performance and to determine add-on factors to the regulatory VaR and sVaR multipliers. Accordingly, no additional back-testing should be applied or assessed for the portfolios relating to market risk internal approaches.