6.

The following requirements must be complied with when marking to model: senior management shall be aware of the elements of the trading book which are subject to mark to model and shall understand the materiality of the uncertainty this creates in the reporting of the risk/performance of the business; market inputs shall be sourced, where possible, in line with market prices, and the appropriateness of the market inputs of the particular position being valued and the parameters of the model shall be assessed on a frequent basis; where available, valuation methodologies which are accepted market practice for particular financial instruments or commodities shall be used; where the model is developed by the institution itself, it shall be based on appropriate assumptions, which have been assessed and challenged by suitably qualified parties independent of the development process; there shall be formal change control procedures in place and a secure copy of the model shall be held and periodically used to check valuations; risk management shall be aware of the weaknesses of the models used and how best to reflect those in the valuation output; and the model shall be subject to periodic review to determine the accuracy of its performance (e.g. assessing the continued appropriateness of assumptions, analysis of profit and loss versus risk factors, comparison of actual close out values to model outputs). For the purposes of point (d), the model shall be developed or approved independently of the front office and shall be independently tested, including validation of the mathematics, assumptions and software implementation.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.