This is the value of unrealised gains (losses) on the fair value of debt securities during the relevant period.This item does not include foreign currency gains (losses) that occur due to currency translation of the debt securities.Gains (losses) are realised where the entity disposed of an asset during the relevant period. If an asset has not been disposed of during the relevant period, then any increases or decreases in the fair value of the asset are recognised as unrealised gains (losses).Debt securities are transferable instruments evidencing a relationship of indebtedness. It is characterised by having a definable income stream that is not based on the economic performance of the issuing entity.