Stock layer in LIFO valuation (LIFO = last in, first out).
In the case of a material subject to LIFO valuation or a pool, a positive difference between the opening and closing stock balances of a fiscal year forms a layer for balance sheet valuation purposes. This layer is valuated as a separate item. The total stock of a material is the sum of all existing layers.
A layer is dissolved again if there is a negative difference between the opening and closing stock balances at the end of a fiscal year. The layers created last are dissolved first.