Tucked into the RBA's October Financial Stability Review is a warning that the way the AI boom is being funded, including circular vendor financing, could help trigger a sharp repricing in global markets.

Most coverage of the artificial intelligence boom focuses on what is being built: data centres, chips and the software that runs on them. The RBA's October 2026 Financial Stability Review (FSR) draws attention to a less visible question: how all of that is being paid for.

In its Financial Stability Assessment, the FSR lists AI-related expectations and financing, including what it calls circular vendor financing, among the global threats that could act as a trigger for a sharp repricing of assets. The phrase is unfamiliar to many readers, so it is worth unpacking what it means in general terms, why a central bank would mention it, and how it fits alongside the RBA's broader view that Australia's financial system is resilient.

What circular vendor financing means

Vendor financing in general is a familiar arrangement: a supplier helps a customer pay for the supplier's own products, for example by extending credit, offering deferred payment terms or investing in the customer's business. It is common across many industries and is not inherently a problem.

The "circular" element describes a loop. In broad terms, it refers to situations where money flows from a supplier to a customer, through a loan, investment or similar arrangement, and then flows back to the supplier as purchases of its products or services. Where that happens at scale, a few general concerns arise:

  • Demand can look stronger than it is. Sales that are partly funded by the seller may overstate how much independent demand exists.
  • Risks become linked. If the customer struggles, the supplier may face both lost sales and losses on the financing it provided.
  • Expectations do a lot of work. Valuations and lending decisions on both sides may rest on optimistic assumptions about future growth.

These are general features of the structure, not findings about any particular company. What the FSR does is identify AI-related financing, including this pattern, as one of several potential triggers for a sharp repricing.

Where the warning sits in the FSR

The circular financing point appears in a list of global threats in the Financial Stability Assessment. Alongside AI-related expectations and financing, the RBA identified:

  • rising sovereign debt in some large economies;
  • leveraged, price-sensitive investors active in bond markets;
  • low risk premia, meaning investors are being paid relatively little to bear risk;
  • operational risk; and
  • defaults in private credit in late 2025 and early 2026, which it described as largely idiosyncratic.

The minutes of the RBA's September Monetary Policy Board meeting add some context: global bond yields had risen notably, mainly reflecting higher real yields, while long-term inflation expectations remained broadly stable.

The common thread is vulnerability to a sudden shift in sentiment. When risk premia are low, prices leave little room for disappointment. If expectations about AI were to be revised sharply, financing arrangements that depend on those expectations could amplify the adjustment, and leveraged investors could add to selling pressure.

The media release accompanying the FSR, published on 1 October 2026, summed up the overall picture: "Australia's financial system has a good degree of resilience", but global and operational vulnerabilities are growing.

Why an Australian central bank cares about global AI finance

It is reasonable to ask why an Australian central bank would highlight a risk tied to global technology financing. Part of the answer lies in how global shocks travel.

A sharp repricing in global markets can affect Australian investors directly through the value of their holdings. Superannuation funds, which hold around one-third of Australia's financial system assets, were the subject of a separate RBA stress test that assumed funds could largely meet a surge in member switching to cash from their international equity portfolios. That assumption illustrates how closely domestic savings are linked to offshore markets.

The AI boom is also feeding into the real economy. At the 29 September media conference, Governor Michele Bullock said "the global AI investment boom has driven significant price rises for some inputs" and that "The AI boom is also adding to demand in the Australian economy at a time when we already have capacity pressures." The minutes of the September Monetary Policy Board meeting said the boom drove strong growth in Asian trading partners and pushed up the prices of key AI supply-chain components.

In other words, the AI boom shows up in two places in the RBA's thinking. On the monetary policy side, it is adding to price pressures. On the financial stability side, the way it is financed is a potential source of market fragility.

How the RBA frames resilience

None of this amounts to a forecast of a market fall. The FSR's overall judgement is that "The Australian financial system has a good degree of resilience". The FSR's bank stress test offers one gauge of that resilience. Under an adverse scenario in which unemployment rose to 6.3 per cent, the cash rate rose to 5.6 per cent, housing and commercial property prices fell 20 per cent and GDP contracted severely, the banks' Common Equity Tier 1 (CET1) capital ratio of 12.4 per cent in June 2026 was "estimated to decline to around 11.6 per cent".

Its recommendations focus on preparedness, including maintaining operational resilience, keeping lending standards sound, strengthening superannuation liquidity risk management, and improving risk management, scenario analysis and crisis simulations.

For individual investors, the FSR is not a guide to buying or selling any asset. It may, however, prompt some general questions worth understanding, such as how much of a portfolio depends on a single theme, and how funds or managers describe their exposure to it. Those weighing such questions may wish to seek advice from a licensed professional.

The bottom line

Circular vendor financing describes arrangements where money lent or invested by a supplier comes back as purchases of that supplier's products. The RBA has flagged AI-related expectations and financing, including this pattern, as one of several global threats that could trigger a sharp repricing, particularly while risk premia are low. The central bank's overall view remains that Australia's financial system has a good degree of resilience, but the warning highlights how the AI boom touches both inflation and financial stability.