Available-for-sale assets
4.  If there is a difference between the value of an available-for-sale asset as reflected in the balance-sheet of a qualifying person at the end of the basis period of the year of assessment immediately preceding the relevant year of assessment of the qualifying person and —
(a)the value of such asset as reflected in the balance-sheet at the beginning of the basis period of the relevant year of assessment; or
(b)the value that is recognised for tax purposes as the value of such asset at the end of the basis period of the year of assessment immediately preceding the relevant year of assessment,
a corresponding amount shall be brought into account as a positive or negative adjustment (as the case may be); and such adjustment which is not of a capital nature shall not be taxed or allowed as a deduction for the relevant year of assessment but shall only be taxed or allowed as a deduction when the asset is subsequently impaired or derecognised in accordance with FRS 39.