Iran's Energy Shock Is Giving Markets an Uncomfortable Case of Déjà Vu

There is a particular kind of dread that settles over commodity traders when a geopolitical crisis starts to rhyme with a previous one. Right now, as tensions surrounding Iran send tremors through global energy markets, that dread has a very specific shape: it looks like February 2022, the month Russia rolled tanks into Ukraine and rewired the global economy in ways that took years to fully absorb.

The comparison is not merely atmospheric. The invasion of Ukraine triggered one of the most violent commodity price shocks in modern memory, sending natural gas prices in Europe to historic highs, pushing Brent crude past $130 a barrel, and scrambling supply chains that had been quietly humming along for decades. Governments that had spent years treating energy security as a solved problem suddenly discovered it was anything but. The Iran situation is activating the same pressure points, and investors who lived through 2022 are responding with a muscle memory that is equal parts rational and reflexive.

What makes the Iran shock particularly unsettling is not just the volume of oil potentially at risk, but the geometry of where that oil moves. Iran sits astride the Persian Gulf, and any serious escalation raises the spectre of disruption to the Strait of Hormuz, the narrow chokepoint through which roughly 20 percent of the world's traded oil passes every single day. That figure has not changed much in decades, and neither has the fundamental fragility it represents. The global economy built itself around the assumption that this corridor would remain open, and every time that assumption is tested, the system reveals how little redundancy it actually contains.

The Ukraine parallel holds here too, but with an important structural difference. Europe's dependence on Russian gas was a regional vulnerability that, once exposed, could theoretically be engineered away over time through LNG terminals, renewable buildout, and demand destruction. A Hormuz disruption would be a global vulnerability, hitting Asian importers like China, Japan, South Korea, and India simultaneously, and doing so with far less warning and far fewer immediate substitutes. The cascade from that kind of shock would not stay in energy markets for long. It would move into shipping costs, manufacturing input prices, and eventually into the inflation figures that central banks have only recently managed to drag back toward their targets.

There is a second-order consequence embedded in this situation that financial commentary tends to underplay. If energy prices spike sharply and persistently, central banks in the United States, Europe, and elsewhere face an excruciating dilemma. Rate cuts that markets have been pricing in throughout 2024 and into 2025 would become politically and technically harder to justify if headline inflation re-accelerates on the back of an oil shock. The Federal Reserve and the European Central Bank spent enormous institutional credibility on their inflation-fighting campaigns. Reversing course, or even pausing, while energy prices are climbing would invite exactly the kind of second-guessing they spent two years trying to silence.

This creates a feedback loop with real consequences for ordinary borrowers. Higher-for-longer interest rates, sustained by an energy shock rather than by domestic demand, would continue to squeeze mortgage markets, dampen business investment, and slow the housing construction that multiple economies desperately need. The geopolitical event in the Gulf would thus transmit itself, quietly and with a lag, into the credit conditions facing a family trying to refinance in Ohio or a developer trying to break ground in Manchester. These connections are real, even if they are rarely drawn explicitly in the same breath as news about Iranian oil exports.

What the Ukraine experience ultimately taught markets is that the first price move is rarely the last one, and that the secondary effects, the ones that arrive six to eighteen months after the initial shock, are often more economically significant than the headline spike. Investors who remember 2022 know that the energy crisis did not peak when crude oil peaked. It peaked when European industry started curtailing production, when fertiliser prices collapsed agricultural planning across the developing world, and when the full weight of the shock finally settled into consumer price indices that governments could no longer explain away.

If the Iran situation continues to escalate, the world may be about to learn that lesson again, this time without the benefit of surprise.