(6)It is appropriate to have rules that ensure that valuations for the purposes of informing the choice and design of resolution actions or the extent of write-down and conversion of capital instruments at point of non-viability are fair, prudent and realistic, to ensure that all losses are fully recognised at the moment the resolution tools are applied or the power to write-down or convert relevant capital instruments is exercised. The choice of the most appropriate measurement basis (the hold value or the disposal value) should be made for the particular resolution actions being considered by the resolution authority.