It stands for available stable funding; a bank’s total available stable funding (ASF) is the portion of its capital and liabilities that is stable beyond the current year- that is, it will remain on its balance sheet for more than one year. This funding is determined based on the nature of a bank’s funding sources and their degree of stability over time.

An ASF factor is assigned to the carrying value of each element of funding, ranging from 100% – implying that the funding is expected to be fully available in more than a year – to 0% – reflecting that funding from a certain source is not stable and hence unreliable. ASF factors take other specific values or levels such as 95% (retail deposits), 90% and 50%.

The total amount of ASF is the sum of the ASF amounts for each category of liabilities.