Trump tweets in Washington. Seconds later, the numbers on the sign at the Bindi Bindi roadhouse tick up.
Not the next morning. Not after the tankers have been rerouted. Seconds.
The farmers in Moora have worked this out faster than the press has. They're checking Truth Social before the ABC weather forecast. The rain still decides the year. But the diesel that lets them chase the rain is now priced by a phone six thousand miles away, and the phone updates more often than the bureau does.
That's the story.
I've got cousins seeding outside Moora this week.
If you don't know the WA wheatbelt, late April into May is when the year is decided. $400,000 rigs running twenty-hour days. Seeding bars moving across paddocks bigger than English counties, lit up through the night. Every grower making the same bet on rain that hasn't arrived yet.
The ACCC reported diesel up 27.8 cents a litre across the five largest cities in a single week in late March. Regional retail moves harder and faster than the capitals. For a seeding operation burning 1,000 litres a day, across a four-week window, that's around $10,000 of unbudgeted fuel cost per tractor. It comes out of the margin of a crop that isn't even in the ground.
None of those farmers buy oil from Iran. The crude they depend on is refined in Singapore and lands at Kwinana. Australia had roughly 36 days of petrol and low-30s for diesel and jet fuel in reserve in March — the highest level in more than a decade. The ships are still coming. The molecules are still arriving.
So what exactly are my cousins paying for?
Reuters documented it in black and white. One post from Trump on Iran, and more than 13,000 Brent and WTI lots traded in sixty seconds. A single $500 million futures position placed in the minute before one of his statements. On March 23, oil fell as much as 15% within minutes of his delay announcement. Not over a day. Within minutes.
Between the post and the reversal, not a single molecule has moved. The tankers haven't sailed. The refineries are processing exactly the crude they were processing yesterday. What's changing is the risk premium. And the risk premium is being reset by one man's thumbs, across trillions of dollars of global derivatives.
The diesel price at the Bindi Bindi bowser is the downstream echo of that reset.
In October 1987, automated portfolio insurance programs turned a market correction into a 22.6% single-day crash. Federal Reserve research, citing the Brady Report, records one institution selling thirteen blocks of just under $100 million each, for a total of $1.1 billion during the day. Algorithm-driven. Markets around the world collapsed in sequence as the feedback loop ran.
The Brady Report named program trading as the amplifier. Circuit breakers were introduced. Position limits were tightened on equities.
None of that applies to energy derivatives. The same kind of automated trading that crashed the stock market in 1987 now runs on Brent crude futures. The trigger is a social media account. The victims aren't stockholders.
In 1987 the losses were on paper and the market recovered in weeks. In 2026 the losses are on the diesel invoice in Moora and the gas bill in Brisbane. Those don't recover.
Vitol, Trafigura, Mercuria and Gunvor — the four biggest private trading houses — have earned more than $57 billion in net profits since Russia's full-scale invasion in 2022. Vitol alone made $15.1 billion in 2022 and around $13 billion in 2023. In 2024 it distributed $10.6 billion to its partners, averaging over $17.5 million each across roughly 600 senior staff.
These aren't companies that found new oil. They didn't refine more crude or build new terminals. They were paid — enormously — for being the counterparties when the price of risk went vertical.
The oil majors made $199 billion in 2022 and got hit with windfall taxes across three jurisdictions. The trading houses earned their $57 billion and got nothing. Not a surcharge. Not a reporting requirement. Not even a parliamentary inquiry.
Australia doesn't just pay the diesel price. It negotiates it.
When prices spike, the government has a familiar set of tools: cut fuel excise, release reserves, underwrite shipments. It looks like relief. But look at the scale.
Australia burns roughly 30 billion litres of diesel a year. At that volume, every 10 cents at the bowser is worth about $3 billion a year. A 25-cent move — the kind we've seen in recent spikes — is $7 to $8 billion annualised, or $3 to $4 billion over six months.
That's not a rounding error. That's a fiscal event.
Now go back to Moora. Diesel rises 30 cents. The government doesn't have to cover all of it for the logic to kick in. Even partial intervention shifts the burden. The farmer pays part. The taxpayer absorbs part. The trader keeps the spread. Nothing in the system changes. The ships still arrive. The refineries still run. The exposure is still there. Only the payer moves.
And here's the uncomfortable part. The subsidy doesn't stay in Australia. It flows through the same chain as the price — importers, refiners, trading desks, derivatives markets — and ends up where the premium is set. Australian taxpayers absorb volatility created offshore and monetised offshore.
It does one more thing. It blunts the signal. When fuel prices rise, the system is supposed to do something: accelerate EV adoption, shift behaviour, reduce exposure. But when the state steps in, the price signal weakens. Payback periods stretch. Transition slows. You end up subsidising fossil exposure at exactly the moment you need to reduce it.
If this were a physical shortage, the intervention would make sense. It isn't. Australia has fuel. The ships are arriving. Storage is higher than it's been in more than a decade. What's moving is the price.
So what the government is actually doing is very specific. It's turning a global financial signal into a domestic fiscal liability.
A 30-cent move at the bowser isn't just a price change. It's a multi-billion-dollar signal. The question isn't whether we can afford to absorb it. The question is why we keep choosing to.
Position limits on wheat have been embedded in US commodity regulation for generations. Try to corner the grain market in Chicago and a dozen regulators will be on you before lunch.
Energy was treated more lightly for much longer. In Europe, specific position limits were only introduced for Dutch TTF gas futures from July 2024. In the US, the CFTC's 2020 rule finally imposed federal speculative position limits across 25 physically settled commodity contracts — but for energy, those federal limits apply only in the spot month.
My cousins grow the underlying commodity of one of the most tightly regulated derivatives markets in the world. The diesel their tractors burn to do it sits in a market that got its first real EU position limit eighteen months ago, and in the US is still only constrained in the final month before delivery.
Speculating on the wheat my cousins are putting in the ground this week is a crime against humanity. Speculating on the diesel their tractors are burning to do it is a legitimate business.
My cousins are on the tractor right now. The rain hasn't come. The numbers on the sign at the Bindi Bindi roadhouse moved again this morning. And somewhere in Washington, a man is about to post something on his phone. The sign will move again before he's put the phone back in his pocket.
Every cent of that movement is a premium reset by a tweet, collected by people my cousins will never meet, and paid out of a tax base that should have been spent on the things that would make this stop happening.