APRA's First System Risk Stress Test Finds Four Major Banks and Six Large Super Funds Withstood a Severe Liquidity Shock, but Flags Concentration and Shared Service Providers

The Australian Prudential Regulation Authority, known as APRA, has published the findings of its first System Risk Stress Test, an exercise designed to look at how the banking system and the superannuation system behave together under stress. APRA published the findings on 30 June 2026. The facts below come from APRA's announcement. The regulator's release does not contain some figures that have appeared in secondary commentary, such as the dollar value of super fund holdings of bank securities or how group death cover was treated, so those claims are omitted here.

What was tested

The exercise was conducted in 2025 with the four major banks and six large superannuation funds. Most stress tests of financial institutions look at one sector at a time, or at one institution at a time. This one was built to examine interactions: how a shock moves between banks and super funds and how their separate reactions may reinforce or offset one another.

The scenario was described by APRA as severe but plausible. It had three elements. The first was liquidity pressure on banks greater than any large Australian bank has faced in the past 50 years. Liquidity is the ability to meet payments as they fall due, and a run of withdrawals or a freeze in funding markets can strain it even when a bank is solvent. The second was a surge of withdrawals and switching out of super funds well above the levels seen during COVID. The third was an operational disruption at a material service provider, meaning a company on which several institutions depend for functions such as administration or technology.

The headline result

APRA reported that all participants withstood the shock and were able to rebuild liquidity. In plain terms, none of the ten institutions failed the test. That outcome is consistent with the regulator's longstanding message that Australia's largest institutions are well capitalised and liquid, but APRA used the exercise to look for weaknesses, not to certify strength.

Stabilise or amplify

One of the most useful findings concerns the role of super funds. APRA found that super funds can help stabilise the system or amplify stress, depending on the type of shock. In a solvency stress, where banks need capital, super funds can provide equity capital to banks, which supports the system. In a bank-specific liquidity stress, however, super funds can amplify the problem, for example if they withdraw funds or reduce exposure to the stressed bank. The distinction matters because super funds hold very large pools of money, and their decisions can add to or relieve pressure on banks.

Vulnerabilities

The regulator identified several vulnerabilities. The first is concentration, meaning that a small number of institutions, markets or exposures account for a large share of activity, so that trouble at one point has wide effects. The second is mismatched behavioural assumptions. Banks and super funds each make assumptions about how the other will behave in a stress, such as whether depositors will leave or whether investors will stay, and these assumptions may not be consistent. If both sides expect the other to provide liquidity, neither may be prepared. The third is shared service providers: when many institutions use the same provider, an outage or failure there can hit several of them at once.

APRA also said that risks increase as the superannuation system grows, and that super funds need stronger severe-stress testing. Because super is a larger part of the financial system each year, the way it behaves under stress is becoming more significant for financial stability.

Next steps

APRA said it intends to propose changes to bank liquidity requirements, with consultation expected within 12 months. The release does not say what the changes will be, so it is too early to tell whether banks will face higher buffers, different assumptions or new reporting. APRA chair John Lonsdale said that decisions made in one part of the financial system can impact other institutions, which is the rationale for testing the system as a whole.

What it means

For households, the findings are reassuring about the ability of major institutions to withstand a severe shock, though the exercise was a model scenario and not a prediction. For banks, the proposed liquidity changes could affect funding costs, and the consultation will be the place to see the detail. For super funds, the call for stronger stress testing suggests more scrutiny of how they would behave in a crisis. For anyone running critical services, the focus on shared providers is a reminder that operational resilience is part of financial stability.

How to read a system-wide test

A conventional stress test asks whether one firm can survive a shock. A system-wide test asks a different question: what happens when many firms respond to the same shock at once, and their responses affect each other? A bank that sells assets to raise cash lowers prices for everyone else holding those assets, and a super fund that moves money to safer holdings reduces demand for bank funding. Because each participant acts sensibly for itself, the combined result can be worse than any single plan suggests. APRA's finding that super funds can stabilise or amplify stress, depending on the kind of shock, is an example of this feedback between sectors.

The reference to a shared service provider adds another layer. Financial stability is often discussed in terms of capital and liquidity, but a failure of administration or technology can stop institutions from carrying out transactions even when they have money. Including an operational disruption in the same scenario as the financial shock tests whether the two problems together are manageable. APRA's release says participants withstood the combined shock, although it also names shared providers as a vulnerability to be addressed.

Limits

This article is based on APRA's published findings and does not include the underlying data, which APRA did not publish in the release. Stress tests are scenario analyses and do not forecast actual events. It is general information, not financial advice.