Oil Is the Headline. Capacity Is the Constraint.

Three releases landed on Tuesday 13 October. Read together, they tell a more useful story than any one alone.

The Reserve Bank published the minutes of its 28 and 29 September Monetary Policy Board meeting, the meeting that lifted the cash rate to 4.60 per cent. NAB released its September Monthly Business Survey. And the IMF published its October World Economic Outlook, titled "Resilience under Strain, Urgent Choices", at the annual meetings in Bangkok.

The obvious headline is oil. Brent crude was trading around US$106 a barrel on Tuesday morning after renewed attacks in the Middle East, and the national average for regular unleaded was 244.4 cents a litre on 12 October. The more interesting message, at least for me, sits underneath the oil price.

What the minutes say about oil

The RBA is clear that the Middle East risk it flagged in August has "crystallised". Global energy prices were significantly higher than assumed, reflecting disrupted shipping, damaged refineries and low inventories. Domestic petrol and diesel prices were 13 per cent higher than the RBA had forecast in August.

But on the stronger than expected July inflation data, the staff's preliminary assessment was that the surprise was "more likely to reflect greater domestic capacity pressures than unexpectedly strong pass-through of cost increases flowing from the Middle East conflict."

That is the line I keep coming back to. Oil is the shock everyone can see at the bowser. The Board's deeper concern is that the economy has less spare room than it thought. Growth in unit labour costs is above what is consistent with the inflation target, driven by weak productivity rather than particularly strong wages. Business liaison reports widespread cost growth, with few firms expecting it to ease over the year ahead. Firms' short to medium term inflation expectations have drifted higher.

The minutes also contain a sentence worth reading slowly. Returning inflation to target "in an environment of more persistent adverse supply shocks would require accepting slower growth in demand and employment than would otherwise be the case." In plain terms, the trade-off has worsened, and the Board has said which way it will lean.

The business survey, from the other side

NAB's survey shows business confidence fell 4 points to minus 13 in September, the third consecutive monthly decline. NAB puts that 18 points below the long-run average and in the bottom 5 per cent of readings in the survey's history. Gareth Spence, NAB's Head of Australian Economics, described businesses being hit from three directions: the rate and inflation outlook, global uncertainty, and elevated fuel and diesel costs. Employment conditions fell to their lowest level in five years.

Yet capacity utilisation was 82.3 per cent, around 1 percentage point above its long-run average, where it has sat for about four years.

So businesses feel worse, but many are still running close to full. That is exactly the tension the RBA describes. Weak sentiment points to softer activity. Tight capacity keeps inflation risk alive. As Spence put it, how that tension resolves will matter for the RBA outlook.

There is a Queensland note as well. Conditions here fell 4 points and are now broadly in line with New South Wales and Victoria. Western Australia remains the clear outlier, with trend conditions at plus 16.

The global frame

The IMF lifted its 2026 global growth forecast slightly, to 3.1 per cent, helped by AI-related investment. It expects global inflation of 4.7 per cent this year and 4.1 per cent in 2027. Its reference case now assumes the Strait of Hormuz reopens in March 2027, with conditions back to a pre-war state by October 2027. Silvana Tenreyro, the IMF's economic counsellor, said the global economy's resilience "is reaching its limits."

Global oil inventories are being drawn down by about 2.7 million barrels a day, which narrows the cushion that has absorbed the shock so far. And the IMF now puts the probability that global inflation exceeds 5 per cent in 2027 at about 35 per cent, up from 30 per cent in April. In its severe scenario, with the conflict running to the end of June 2027, oil reaches US$130 a barrel.

For Australia, the IMF forecasts growth of 1.9 per cent in 2026 and 1.6 per cent in 2027, each 0.1 percentage point lower than its April forecasts.

What I take from it for property and credit

A few observations, offered as personal views.

First, the rate conversation is not only about oil. If oil eased tomorrow, the minutes suggest the Board would still be focused on capacity, unit labour costs and expectations. Waiting for a ceasefire headline to change the rate outlook may mean watching the wrong variable.

Second, time and cost assumptions matter more in this kind of environment. Fuel and diesel flow through to freight, construction inputs and site costs, and the Board has said it will accept slower growth to bring inflation down. Feasibility and timeline assumptions made earlier in the year were set in a different backdrop.

Third, the household sector is still resilient. The minutes estimate that fewer than 2 per cent of owner-occupier borrowers face a cash flow shortfall, savings buffers remain substantial, and staff analysis suggests very few borrowers would be in negative equity even if housing prices fell 20 per cent. Housing conditions are tight: prices have fallen more than expected and new loan commitments have dropped sharply, led by investors. Tight is not the same as broken.

Fourth, the risks the Board ranks highest come from abroad. It points to global bond markets with more price-sensitive and leveraged investors, low risk premia in equity and credit markets, and a large build-up of AI-related debt. Those shocks can change funding conditions quickly, and deserve as much attention as the oil price.

Reading the week

None of this is a forecast or a call on anything. The oil price will keep moving with the news from the Middle East. The minutes tell us the constraint the Board worries about most is closer to home, and that it is prepared to accept slower growth to deal with it. That is the part worth remembering when the oil headlines swing.

Personal views, not financial advice.