How Does the Iran Conflict Affect the Global Economy?
The short answer: far more than most people expected. Following a joint US-Israel military operation dubbed Operation Epic Fury, tensions in the Middle East have rapidly escalated into a full-scale conflict — and the economic ripple effects are already being felt worldwide. Oil prices have jumped over 30% in a single week, natural gas futures in Europe have surged more than 60%, and hundreds of ships are stranded in one of the world's most critical shipping lanes. Even if you live thousands of miles from the region, this conflict is likely to affect what you pay for gas, groceries, and just about everything else that moves through a supply chain.
You might be wondering: why does a war in a heavily sanctioned, relatively isolated country cause this much disruption? Iran's GDP is roughly one-fifth the size of Canada's despite having double the population. Yet its geographic position in the Middle East gives it enormous leverage over global energy markets — leverage that is now being wielded in very real ways.
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Richard explains why Iran's isolated economy still has outsized leverage over global energy markets
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What Happens to Oil Prices During a War with Iran?
Historically, any military confrontation involving Iran causes oil markets to spike almost immediately. Traders anticipate supply disruptions, and this time is no different — except the disruption is happening faster and more dramatically than past episodes.
Within days of the initial strikes, West Texas Intermediate crude reached nearly $90 a barrel, up over 30% in less than a week. The Brent crude index climbed 25% to $91 a barrel. These are significant moves for a commodity that underpins virtually every sector of the global economy.
Iran itself produces about 4% of the world's oil and holds roughly 12% of global oil reserves — the third largest reserve on the planet. Despite sanctions, Iran has developed sophisticated black market channels to keep exporting, with over 80% of its oil flowing to China. An estimated 520 million barrels were sent to China in 2025 alone, making Iran the second-largest source of crude for the country. Any disruption to that supply sends China scrambling for alternative sources, which pushes global prices higher for everyone.
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Map of the Strait of Hormuz showing its 33km chokepoint and the volume of oil that transits daily
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Why Is the Strait of Hormuz So Critical to World Oil?
Here's where the real economic danger lies. The Strait of Hormuz is a narrow waterway — just 33 kilometers wide at its tightest point — connecting the Persian Gulf to the Gulf of Oman. It is arguably the single most important chokepoint in global energy markets.
- About 31% of all seaborne crude oil passes through the strait daily
- Roughly one-fifth of total global crude supply transits this waterway
- Major exporters including Saudi Arabia, the UAE, and Iran itself rely on it
- Around 84% of that oil is destined for Asian economies including China, India, Japan, and South Korea
Iran shares the northern border of the strait — including its narrowest choke point. On Monday following the initial strikes, Iran's Islamic Revolutionary Guard Corps announced it was closing the strait entirely, threatening to set any passing vessel ablaze. Eight ships have already been struck. Major shipping companies suspended all transit and anchored their vessels, effectively killing traffic through the channel and stranding hundreds of ships.
A senior portfolio manager at Neuberger Berman warned that if the closure lasts more than a month, crude prices could push well into the triple digits — a level not seen since 2022. Even with alternative routes available, analysts at Ryside Energy estimate a supply drop of 8 to 10 million barrels per day, equivalent to nearly 10% of global supply.
Are There Alternatives to the Strait of Hormuz?
Yes — but they're not a complete solution. The threat of Iran closing the strait has always existed, so regional powers have invested in workarounds over the years.
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Richard breaks down alternative oil export routes and why they don't fully replace the strait
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Saudi Arabia has pipeline capacity of 5 million barrels per day that can bypass the strait and reach the Red Sea directly, covering most of what the kingdom previously exported through Hormuz. The UAE has infrastructure connecting directly to the Gulf of Oman.
The problem? The Red Sea comes with its own risks. Houthi rebels in Yemen — who are backed by Iran — have a track record of striking freight vessels in the Red Sea. The current conflict has already seen critical infrastructure damaged in the region, including refineries, oil storage facilities, a fuel tank terminal, and Oman's port of Duqm. So while these alternatives exist, they are neither unlimited nor risk-free.
How Does Middle East War Affect Food and Gas Prices?
Oil is the obvious one, and the impact on gasoline prices is already underway. But the economic disruption extends further than most people realize.
Natural gas is also a major commodity transiting the Strait of Hormuz, used for heating, electricity generation, and industrial fuel. European natural gas futures have already jumped over 60% since the conflict began.
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The Kiel Institute war cost calculator showing projected GDP and capital losses for Iran and the world
Watch at 14:25 →
Perhaps more surprisingly, about one-third of the world's urea — a key nitrogen-based fertilizer — also moves through the strait. Urea prices have jumped 25% since the initial attack. When fertilizer prices rise, food production costs follow, and that eventually shows up in grocery store prices. Combined with surging fuel costs (which make shipping and transportation more expensive across the board), virtually every product in global supply chains faces upward price pressure.
Air travel has also been disrupted, with flights cancelled and airspaces closed across the Middle East. Marine and airline insurance companies have already moved to cancel war-risk coverage related to Iran, which discourages companies from operating in the region entirely and pushes up costs for those that do. Tanker prices have jumped sharply as a result.
How Does War Drive US Inflation and Interest Rates?
For American consumers, the most immediate concern is inflation. The US economy was already wrestling with the effects of tariffs on price levels when this conflict broke out. A sharp rise in energy costs ripples through almost every sector — manufacturing, logistics, agriculture, retail — and the Federal Reserve will be watching closely.
If inflation re-accelerates, the Fed may be forced to pivot from rate cuts to rate hikes, which would increase borrowing costs for mortgages, car loans, credit cards, and business financing. That's a meaningful shift for an economy that has been hoping for rate relief.
US government debt is also worth watching. Military spending tends to increase significantly during conflicts, and the White House is already facing pressure after the Supreme Court ruled Trump's IEEPA tariffs were illegal, removing an anticipated source of revenue. Higher spending plus higher interest rates is a difficult fiscal combination.
Is War Actually Good for the US Economy?
There's a persistent myth that war is good for economic growth — largely because government spending surges and the US is geographically shielded from the direct physical destruction. And it's true that certain sectors benefit: defense contractors, energy companies, and some manufacturers tend to see gains.
But the broader picture is more complicated. Inflation spikes, interest rates rise, trade volumes decline, and freight costs surge during geopolitical conflicts of this nature. The US is not immune to these forces just because the fighting is happening overseas. And if the conflict drags on — which history suggests is likely — the cumulative economic cost grows substantially.
Using the Kiel Institute's Price of War calculator, a conflict in Iran lasting 3.5 years could cost Iran nearly $1 trillion in lost capital, cause its economy to contract by over 30%, and result in more than $1 trillion in cumulative GDP losses for other countries worldwide. That's an extreme scenario, but it's not an impossible one.
Should You Change Your Investments Because of the Iran War?
Probably not — at least not in ways driven purely by short-term headlines. Historically, US stock markets have not exhibited a consistent long-term relationship with geopolitical conflicts. Yes, there tends to be a sell-off in the immediate aftermath of major events, but returns typically normalize as the situation clarifies and other economic variables take over.
Reacting to every geopolitical development by restructuring your portfolio is more likely to hurt your long-term returns than help them. The situation in Iran is genuinely serious and evolving — factors like OPEC+ increasing production, US naval escorts through the Gulf, and potential diplomatic developments could shift the picture meaningfully in either direction. If you're investing for the long term, patience and diversification remain more reliable strategies than trying to trade the news cycle.
That said, understanding why oil markets move, how energy disruptions feed into inflation, and what the real economic stakes are in a conflict like this one — that knowledge is genuinely useful, no matter what happens next.
