What's happened in the war on Iran?
The US-Israeli war on Iran, and Iran's military response – and the de facto closure of the critical Strait of Hormuz chokepoint – have shaken financial markets across the world. The war has sent oil and gas prices soaring and stocks falling (unless you're a big oil company; Shell hit record highs) and shaken up expectations of future growth (down), inflation (up) and interest rates (up). In the UK, consumers saw fuel prices jump and mortgage lenders scrambling to pull fixed-rate offers, while wholesale gas prices surged by two-thirds – soon to feed through into higher domestic bills. Even if the conflict remains relatively contained, it is already bad news for the global economy and will affect different regions in different ways, with net energy importers (such as the UK and Europe, and much of Asia) hit worse than net exporters (such as the US).
Why is the Strait of Hormuz so important?
The Persian Gulf and its immediately adjoining lands contain the world's greatest abundance of hydrocarbons and four of the world's five biggest oil fields (in Saudi Arabia, Kuwait and Iran) ship their product out through this narrow stretch of water. According to trade analysis firm Kpler, 31% of crude oil passed through Hormuz last year, along with 34% of global fertiliser supply and 32% of methanol, for example. The Strait's closure caused wild gyrations in the oil price this week. There were double-digit surges and falls according to events and to the latest capricious musing from the US president about his take on the war.
What about gas?
Arguably of even more pressing interest to the UK is the fact that 24% of natural-gas liquids and 19% of liquefied natural gas (LNG) also passes through the strait. Britain is at the start of a historic shift from reliance on domestic and Norwegian gas to far greater imports of Qatari gas (that is, from within the Persian Gulf, projected to make up a bigger chunk of the mix than North Sea gas by 2035). Prices of petrol and diesel have nudged up at the pumps, but wholesale gas prices are up around 60%, and will soon be feeding through into household bills and business costs. Nor is it just hydrocarbons and related products, says Neil Shearing on Capital Economics. Crises such as this have a habit of revealing chokepoints that were previously hidden. Qatar produces 40% of the world's helium, for example, crucial to the production of semiconductors.
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Which economy will be worst affected?
The Middle East itself will be worst hit economically, as well as in lives lost and communities destroyed. During the 12-day war last summer, Israel's economy contracted by around 1% in the second quarter. If the present conflict is short-lived, a fall in output of a similar order of magnitude would seem plausible for both Israel and the Gulf economies. Iran itself might expect a fall in GDP of 10%. Otherwise, the region most exposed is the world's biggest growth engine, Asia. The Gulf supplies 40%-80% of the seaborne crude imports of China, India, Japan and South Korea, notes The Economist. It also accounts for nearly a third of China's LNG imports, more than half of India's and even more for some smaller Asian countries. Last year, 87% of the crude and 86% of the LNG passing through the Strait of Hormuz went to Asia, making any prolonged closure a grave threat to the region.
Will global GDP fall due to the war on Iran?
Yes, but unless the conflict spirals into a wider regional war in which oil supplies are severely disrupted for a prolonged period, then most forecasts cluster around a moderate global slowdown (of less than 1% of global GDP) rather than a catastrophic collapse. But the situation is extremely hard to predict. In the event of (say) a months-long closure of the Strait of Hormuz, major damage to Gulf oil infrastructure and oil prices rising towards $150 – unlikely, but not impossible – analysts suggest a knock to global GDP of up to 3%. While oil-sector experts are panicking, macroeconomists remain relatively sanguine, says Paul Krugman on Substack.
Partly that's because the US and other major economies have changed greatly since the 1970s. “They have become much less dependent on oil, and they are probably much less prone to experiencing inflationary spirals in the aftermath of an oil-price shock.”
How long might the war on Iran last?
“My bet: longer than you would wish,” says Rana Faroohar in the Financial Times. While Donald Trump has reason to want a quick end to the conflict, given the lack of clear objectives and the political damage from rising petrol prices, the Iranian regime has “arguably much to gain by prolonging the pain with drone strikes and attacks on neighbours in the Gulf. These would further disrupt energy markets, driving inflation higher across the world”. As analyst Luke Gromen put it in a recent newsletter, “Iran does not have to defeat the US military; it just has to defeat the US Treasury market”.
What should we expect next?
As the experience of the Ukraine war showed us, “inflation is not a single punch”: it hits first in fuel, then in food and other consumer sectors. Meanwhile, China, easily the largest purchaser of Iranian oil, may yet “leverage its own geo-economic advantage of having purchased ports all over the world” and of “controlling most of the ships on the planet”. Higher shipping costs spell more inflationary pain. And potential bond-market weakness is made worse by more government and corporate bonds being held by short-term, price-sensitive investors than in the past. All this makes it easy to imagine a rapidly unfolding US and global markets crisis. If the longer-term impact of Trump's foreign adventures is to “push up bond yields, inflation (which will only be partially mitigated by America's own domestic energy supply) and US deficits and ultimately trigger a big Treasury sell-off, the US and global economy will suffer mightily. I suspect, sadly, that this war and this market story will be with us for some time”.
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