(6)This Regulation lays down detailed rules on the presentation of the risk and reward profile of the investment, by requiring use of a synthetic indicator and specifying the content of narrative explanations of the indicator itself and risks which are not captured by the indicator, but which may have a material impact on the risk and reward profile of the UCITS. In applying the rules on the synthetic indicator account should be taken of the methodology for the calculation of the synthetic indicator as developed by competent authorities working within the Committee of European Securities Regulators. The management company should decide on a case-by-case basis which specific risks should be disclosed by analysing the particular characteristics of each fund, bearing in mind the need to avoid over-burdening the document with information that retail investors will find difficult to understand. In addition the narrative explanation of the risk and reward profile should be limited in size in terms of the amount of space it occupies within the key investor information document. It should be possible to have cross-references to the prospectus of the UCITS where full details of its risks are disclosed.