The banks have failed in their push to persuade the Australian Prudential Regulation Authority to treat member-directed superannuation deposits as stable deposits under the net stable funding ratio prudential standard.APRA had previously said it would treat member-directed superannuation deposits in the same way as retail deposits, assigning a less stable funding factor than it would apply to deposits made by superannuation fund trustees.The banks have argued in submissions to APRA that, given the size of the superannuation system and the stable nature of investment allocations, the regulator should apply a more stable funding factor. A more stable factor would make it easier for the banks to meet their NSFR targets.In the final NSFR standard released yesterday, APRA said: "When an individual self-selects where to place their funds, the deposit is classified as retail. When a superannuation fund is making a deposit, the deposit is classified as being from a financial institution. APRA has not changed its approach on this issue."APRA said the issue was who controlled the placement and withdrawal of the funds. From the beginning of 2018 banks will have to demonstrate that long-term assets are financed with at least a minimum of stable funding. Stable funding is the portion of an authorised deposit-taking institution's capital and liabilities expected to be a reliable source of funds over a one-year time horizon.NSFR will force banks to reduce their holdings of short-term wholesale funding, which proved to be illiquid during the financial crisis.APRA confirmed that the same 15 authorised deposit-taking institutions that are subject to the liquidity coverage ratio would be subject to NSFR. They are AMP Bank, Arab Bank, ANZ, Bendigo and Adelaide Bank, Bank of China, Bank of Queensland, Citigroup, Commonwealth Bank, HSBC Bank Australia, ING Direct, Macquarie Bank, National Australia Bank, Rabobank Australia, Suncorp Bank and Westpac.