5 The net stable funding ratio (NSFR) is a prudential ratio that measures the extent to which a bank has medium  to long-term funding for its exposures. The NSFR standard is designed to ensure sustainable and stressresistant funding of a bank's asset-side business as well as its off-balance sheet activities.
It is defined as the ratio of sustainable funding (including equity capital and long-term liabilities) over the required stable funding. The minimum ratio is 100%. The NSFR rule is scheduled to enter into force in 2020. 6 This number is based on data from the Bundesbank’s monthly bank balance sheet statistics as of January  2018 (latest data: November 2017).