Energy scarcity is beginning to behave like a structural constraint rather than a temporary shock
The chokehold on the crucial strait of Hormuz has been squeezing international oil supplies for more than three months, but the OECD’s warning lands somewhere more specific than another oil panic. The organisation’s economists are describing a world in which the interruption no longer behaves like a temporary commodity shock. In their “prolonged disruption” scenario, there is no agreement between the US and Iran until 2027. The consequence is not simply higher crude prices. Global GDP growth falls to 2.1% from 3.4% in 2025, with emerging economies hit hardest. What turns the forecast from cyclical slowdown into structural strain is what follows the shortages themselves.
Oil and gas shortages would result in “enforced rationing” of energy for businesses. That phrase matters. Rationing is not a market adjustment; it is an admission that price alone can no longer clear supply. The OECD’s scenario extends beyond fuel into industrial inputs: fertilisers, sulphur and helium prices would rise as supply is curtailed. The disruption spreads from shipping lanes into factory floors and food systems. Policymakers then confront the same trap that defined earlier energy crises: raising interest rates too aggressively to contain inflation risks recession. Inflation arrives through energy and food while growth weakens underneath it. Central banks cannot easily suppress one without worsening the other.
The comparison hanging over the report is 1973. The Organization of Arab Petroleum Exporting Countries instituted an oil embargo on the United States after President Richard Nixon requested emergency aid for Israel. The embargo ceased U.S. oil imports from participating OAPEC nations and nearly quadrupled the price of oil within months. The embargo eventually lifted in March 1974, but the mechanism mattered more than the duration. A regional conflict translated directly into energy scarcity, and scarcity reordered monetary policy, industrial costs and political leverage simultaneously. The OECD is describing a similar transmission channel now, only through a more financially saturated global economy.
Cheap capital and energy abundance now appear less separable than markets assumed
That saturation sits in corporate balance sheets. The cost of borrowing for corporations is likely to increase in either OECD scenario because confidence itself deteriorates under sustained disruption. The report points to $90tn in total corporate debt across G20 economies, with a quarter maturing in the next three years. Debt issued during years of cheaper money now collides with higher refinancing costs just as growth weakens and energy inputs rise. The pressure does not stay inside banks. The report points to concerns about the riskiness of the opaque private credit sector, which has become an increasingly important lender to companies since the 2008 financial crisis. The OECD warns that private credit’s interconnectedness with the broader financial system could create “adverse spillover risks” during a correction. The phrase “spillover risks” understates what the structure implies: large parts of corporate financing now depend on lenders built for a low-rate environment confronting an energy shock that keeps rates elevated.
The vulnerability extends into the sector investors have treated as insulated from old commodity constraints. The OECD analysis suggests the long-running US AI boom could be at risk. Not because demand disappears, but because the infrastructure beneath it consumes extraordinary amounts of energy and specialised hardware. Energy price shocks and shortages would increase datacentre operating costs and constrain the supply of critical hardware used in AI systems. The OECD says this could reduce both the capacity and incentive for AI investment. The assumption carrying much of the current optimism around AI-related growth is that computation scales independently of physical scarcity. The OECD’s scenario quietly contradicts that. Datacentres still run on electricity. Hardware supply chains still depend on industrial inputs vulnerable to energy disruption. An AI boom financed in a cheap-capital world begins to look less detached from geopolitics than markets have priced.
Capital flows are already distinguishing between economies exposed to energy chokepoints and those outside them
The contradiction is visible in oil markets themselves. Donald Trump has repeatedly suggested that a deal with Tehran is imminent, helping calm prices, yet nothing has so far materialised. Instead, talks are suspended, with Iran refusing discussions while Israel continues attacking Hezbollah in Lebanon. Meanwhile, countries are stockpiling oil for domestic use where capacity allows. Stockpiling is a vote against confidence in near-term resolution. It removes supply from open markets precisely because governments suspect future access may worsen. The market recovery in some emerging-market assets after March’s sell-off reflects that same tension. Emerging markets debt rebounded strongly in April, and Latin American assets outperformed partly because the region benefited from insulation from Middle East tensions and higher commodity prices. Capital is already distinguishing between economies exposed to energy chokepoints and those positioned outside them.
Iran sits at the centre of that pressure because it holds 10% of the world’s proven oil reserves and is the second largest producer within OPEC after Saudi Arabia. Crude oil exports account for about 90% of Iran’s export earnings and roughly 60% of government revenues. The country both shapes the oil market and remains deeply exposed to it. Any shock to global oil markets can have a tremendous effect on Iran’s budget and economic structure. That mutual dependency matters because it makes prolonged disruption self-reinforcing. The world economy requires stable flows through Hormuz; Iran’s fiscal structure depends on oil revenues; negotiations remain suspended. Each condition intensifies the others.
The OECD still presents an alternative scenario in which progress toward a durable peace agreement lowers oil prices. Even there, some energy shortages persist, especially in Asia, while global growth reaches 2.8% rather than collapsing toward recession territory. But the report’s harder implication lies elsewhere. The OECD argues that the severity of this oil shock underlines the importance of weaning the global economy off fossil fuels and diversifying energy sources. That is not a climate argument disguised as macroeconomics. It is a statement about strategic dependence. A world economy built on highly leveraged corporations, energy-intensive AI infrastructure and refinancing cycles measured in trillions is still vulnerable to the closure of a single maritime corridor and negotiations that have already stopped.
