Use the fiscal year-end exchange rate for all quarterly and year-end calculations.
How should values in currencies other than EUR be converted to EUR? E.g. at the point of reporting, the point of the impact or an average value in EUR of values in currencies converted to EUR at different reference points over the entire reference period?
With regard to the exchange rate, in order to comply with the requirements of the quarterly calculation and the enterprise valuation at fiscal year-end referred to in Q&A IV.11, financial market participants should use the exchange rate at the end of the fiscal year end for all the reference points.
European Supervisory Authorities (ESAs)