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The impact of the war cannot be measured based on headlines alone. While the news may focus on the oil price and currency moves, there is a far more silent effect that is worth discussing; one that will have a far longer impact than the shorter-term pain of higher oil prices.
Glass
A glass furnace cannot be switched off between shifts. It runs continuously at around 1,500 degrees Celsius, and natural gas accounts for roughly 74% of energy input across European glass manufacturing. O-I Glass, the world’s leading glass manufacturer, with 68 plants across 19 countries, has watched its share price fall by about a third since February. The company walked into the United States (US)-Iran war already carrying a $150 million step-up in European energy costs from expiring long-term gas hedges, meaning it had a sudden increase in operational expenses. While glass rarely features in energy market commentary, this example makes the point that narrow coverage on the oil price ignores the fact that energy prices underpin every input cost, and the impact of these costs is carried through industries and supply chains that most people would never connect to the conflict in the Persian Gulf.
Fertilizer
Fertilizer is a more direct and more urgent victim to the conflict. Natural gas is the primary feedstock for ammonia, the base compound for most nitrogen fertilizers, and roughly 30% of the world’s fertilizer shipments transit the Strait of Hormuz. Constrained supply and elevated gas prices feed into crop nutrient costs, and those costs take time to clear, as planting decisions made under high input cost conditions determine food supply months later. The International Energy Agency (IEA) has flagged that the conflict will keep global natural gas supply tight for at least two years, making food-price inflation a medium-term certainty, not simply a near-term risk.
Helium
Helium is barely being tracked, yet the Gulf is a meaningful source of global supply. Helium is used in MRI machines, semiconductor manufacturing, and data centre cooling infrastructure. A sustained constraint will not make headlines, but it adds real cost and friction to chip production and medical services at a time when neither can absorb much pressure.
Aluminium
The Gulf’s role in aluminium is consistently underestimated. The region accounts for roughly one sixth of global exports, and supply disruption feeds simultaneously into the automotive, construction, and packaging sectors, which are already navigating elevated input costs from several directions.
Petrochemicals
In addition, petrochemicals, made from oil and gas, are key ingredients for plastics, detergents, synthetic fabrics, adhesives, and pharmaceuticals. When both are expensive and constrained, the cost of goods with no obvious connection to an energy market starts moving. The link between a Hormuz disruption and the manufacturing cost of soap or pharmaceutical packaging is real, even if it takes several months to appear in a margin report.
India’s dilemma
India offers one of the cleaner pictures of how a sustained oil shock moves through an entire economy. The world’s third-largest oil importer has seen its import bill expand sharply as Gulf supply has tightened. The rupee has fallen to record lows of Rs95.6/$ and is the worst-performing currency in Asia so far in 2026. The Reserve Bank of India has intervened aggressively, as foreign exchange reserves have dropped to $690.7 billion, and the central bank has capped banks’ daily open foreign exchange positions at $100 million. Indian Prime Minister Narendra Modi has publicly urged citizens to stop buying gold, India’s third-largest import category at $72 billion annually, and to cut overseas travel as the country tries to keep dollars from exiting the country. These are signals of genuine balance of payments stress.
The long-term effect
Coverage of this conflict has primarily focused on crude prices and currency moves. While those matter, the more durable story is in the industries nobody is watching – glass plants running at a loss, the fertilizer supply chain tightening and the helium constraint nobody budgeted for. The effects accumulate across supply chains that were not designed for this, and they reach the end of the chain long after the original event has stopped making news.
MARKET MOVES
Bonds
US Treasury yields have pushed above 4.5% for the first time in a year as hotter April inflation data reset rate expectations. Wholesale prices rose at their fastest pace since 2022, consumer inflation recorded its strongest monthly gain since 2023, and softer retail sales have not yet signalled a meaningful pullback in demand. Markets have fully priced out near-term rate cuts, shifting focus to whether the Fed may need to tighten again before year-end. Trade and energy developments from the meeting between Presidents Trump and Xi remains an added watchpoint.
Germany’s 10-year bund yield edged higher to 3.12%, remaining close to multi-year highs as elevated energy costs keep inflation concerns in focus. Markets are pricing in a high probability of a European Central Bank (ECB) move in June, with further tightening still reflected in year-end expectations. While the US-China summit has improved sentiment around global trade, the lack of progress on Iran and the continued closure of the Strait of Hormuz are limiting any broader relief.
United Kingdom (UK) gilt yields edged lower before spiking to 5.14% as firmer growth data was offset by ongoing political uncertainty and inflation concerns. The UK economy grew 0.6% in the first quarter and 1.1% year on year, with March also surprising to the upside. Bank of England Deputy Governor Sarah Breeden signalled less urgency for further hikes, noting the current conflict may not trigger a repeat of the 2022 inflation shock. Political developments have nonetheless kept the domestic backdrop unsettled.
Equities
US equity futures gave up some gains on Friday after Wall Street’s strongest session in weeks, with the S&P 500 and Nasdaq closing at fresh record highs and the Dow moving back above 50,000. Technology led the advance, with Cisco jumping on stronger guidance and Nvidia extending gains after Washington approved additional H200 chip shipments to selected Chinese firms. Broader sentiment was also supported by constructive headlines from the US-China summit. AI company Cerebras added further momentum in after-hours trade following its market debut.
European equities moved higher over the week before dropping on Friday, with the STOXX 50 and STOXX 600 initially supported by improved US-China trade sentiment and ongoing strength in technology before succumbing to escalating inflation fears. AI-linked names remained in focus, with ASML and Infineon posting solid gains as demand-expectations for infrastructure stayed firm. Industrial technology company Siemens also advanced, extending its post-earnings strength and helping underpin broader regional performance.
The UK’s FTSE 100 looks set to finish the week flat, with ex-dividend effects, political noise and inflation concerns reversing gains from earlier in the week. Power utility company National Grid gained after confirming a £70 billion network investment plan, while stock-specific weakness limited the broader move. Luxury retail brand Burberry fell despite stronger sales, and private equity group 3i came under pressure on concerns around Middle East exposure.
Commodities
Brent remains above $106/barrel and is still heading for a weekly gain of more than 5% as the Strait of Hormuz stays closed and diplomacy shows little progress. The ceasefire remains fragile, with the blockade still central to negotiations. Supply risks also remain elevated after the IEA warned the oil market could stay materially undersupplied through October even if flows begin to normalise next month. Talks between Presidents Trump and Xi added some focus on keeping the route open and expanding US oil exports to China.
Gold is drifting toward $4,600/ounce and is down about 2% for the week as stronger US inflation data has pushed rate-cut expectations out of the market. Hotter producer and consumer prices have revived talks of a possible Fed hike later this year, while the prolonged Hormuz disruption continues to support broader price pressures. With higher rates and a firmer dollar working against bullion, the usual supports for gold have weakened further. India’s tighter gold import rules have added to the near-term pressure.
Currencies
The US Dollar Index is near 99 and set for a solid weekly gain as hotter US inflation has pushed rate-cut hopes further out. Strong April producer and consumer price data have reinforced the view that the Fed will stay on hold for longer, with some risk of renewed tightening later this year. Tensions around Taiwan during the US-China talks have added a geopolitical tailwind to the dollar.
The euro is holding near $1.17/€ but has eased from recent highs as energy-related inflation risks keep the ECB on a hawkish path. Markets continue to price a strong chance of a June hike, with further tightening still reflected by year-end. ECB governor Martins Kazaks has reinforced that stance, warning that sustained oil-driven inflation may require a firmer policy response.
Sterling has slipped to about $1.34/£, its weakest level in more than a month, as UK political uncertainty has intensified. That softer tone has been partly offset by firmer economic data, with UK first quarter GDP rising 0.6% and annual growth reaching 1.1%. Breeden also suggested the current conflict is unlikely to trigger a repeat of the 2022 inflation shock.
*Please note that all information is at the time of writing.
Key indicators:
GBP/USD: 1.3403
GBP/EUR: 1.1475
GBP/ZAR: 22.23
BRENT CRUDE: $107.45
GOLD: $4,571.65
Sources: Al Jazeera, Bloomberg, CBS News, CNN Business, EIA, Farmers Weekly South Africa, IBISWorld, IEA, Reserve Bank of India, O-I Glass and World Economic Forum.
Written by Citadel Advisory Partner and Citadel Global Managing Director, Bianca Botes.
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