Currencies Seek Balance After Gulf War
The Gulf war has shifted the center of gravity in global foreign exchange: the dollar has regained support as a haven, oil exporters have benefited from higher energy revenues, and currencies of energy-importing economies have come under pressure from wider trade bills, inflation risks and shifting interest-rate expectations.
The dollar returns as a haven currency
The currency market in May 2026 is being rebuilt around an energy shock. Bloomberg described this phase as a search for a new equilibrium after the Gulf war, as investors reassess which countries benefit from expensive oil, which pay through inflation and current-account pressure, and which currencies can still function as safe stores of liquidity during geopolitical stress.
The U.S. dollar has received support through two channels. It remains the world’s main reserve currency and the deepest haven during crises. At the same time, higher oil prices raise inflation expectations and may limit how quickly the Federal Reserve can cut interest rates. The Wall Street Journal reported that the WSJ Dollar Index rose 0.29% to 95.09 on May 12, its strongest daily gain since April 29, as U.S.-Iran tensions lifted demand for haven assets.
The oil shock splits currencies into winners and losers
Energy prices are the main transmission channel. When oil rises, exporter currencies tend to receive support from stronger export revenues, improved trade balances and inflows of petrodollar liquidity. For importers, the effect is the opposite: import bills rise, inflation accelerates, business costs increase and real household incomes come under pressure.
The World Bank estimated in its April commodity market outlook that overall commodity prices would rise 16% in 2026, driven by surging energy and fertilizer prices and record highs for several metals. That matters for foreign exchange because commodity shocks directly alter payment flows between countries and force central banks to rethink their rate paths.
The Strait of Hormuz becomes a currency factor
Currency risk has intensified because of disruptions in the Strait of Hormuz, the narrow sea route between the Persian Gulf and the Gulf of Oman through which a large share of global oil and liquefied natural gas trade moves. Disruption to tanker traffic turns a regional war into a global payments shock: energy importers must buy more dollars to pay for more expensive oil, while exporters receive additional foreign-currency revenues.
The World Bank separately said its forecast assumed that the most acute phase of Middle East supply disruptions would end in May and that regional oil exports would recover toward prewar levels by the fourth quarter. It also named renewed escalation and lasting constraints on oil flows as the main upside risks to prices.
Asian currencies face pressure
Asian currencies are especially sensitive to the oil shock because many large regional economies depend on imported energy. More expensive oil worsens trade balances, increases fiscal pressure through fuel subsidies and raises the risk of higher inflation. That leaves importer currencies vulnerable even when domestic demand remains resilient.
Reuters, through Zawya, noted that the closure of the Strait of Hormuz intensified global inflation fears because the route carries about a fifth of global oil flows, while crude has largely remained above $100 a barrel since the war erupted in late February. In that environment, the dollar strengthened, the euro held losses and investors stayed cautious toward risk assets.
The yen gets limited haven support
The Japanese yen is traditionally treated as a haven currency, but this episode has limited that status because of Japan’s energy dependence. When oil and gas prices rise, Japan pays more for imports, worsening its external balance and weighing on the currency. The Gulf war has therefore created a mixed setup for the yen: demand for safety supports it, while higher import costs work against it.
For the Bank of Japan, the shock complicates policy. More expensive energy lifts inflation, but it also pressures consumption and corporate costs. If the central bank tightens too quickly, it risks hurting domestic demand; if it moves too cautiously, interest-rate differentials with the United States may again weaken the yen.
The euro balances inflation and weak growth
The euro is also caught between two forces. The euro area has reduced its direct dependence on Russian energy since the 2022 crisis, but it remains a major energy importer. Higher oil prices therefore worsen the outlook for manufacturing and consumption, especially in countries with energy-intensive industries.
The International Monetary Fund said in its April World Economic Outlook that rising commodity prices, firmer inflation expectations and tighter financial conditions are testing global resilience. Under a limited-conflict assumption, it projected global growth at 3.1% in 2026 and 3.2% in 2027, below recent outcomes and well below pre-pandemic averages.
Gulf currencies depend on dollar pegs
For Gulf economies, the picture is different. Many regional currencies are pegged to the U.S. dollar, so their exchange rates do not directly reflect the full force of the oil shock. Under the surface, however, dollar liquidity, external payments and financial-market access matter more. High oil revenues support budgets and reserves; damaged export infrastructure or disrupted shipments make currency stability more dependent on reserves and U.S. financial links.
In April, U.S. Treasury Secretary Scott Bessent said many U.S. allies in the Gulf and Asia had requested foreign-exchange swap lines. A swap line is an agreement that allows one authority to obtain foreign-currency liquidity, usually dollars, in exchange for its own currency. Such requests show that even wealthy commodity economies value access to dollar liquidity in a crisis.
The rupee and other importer currencies pay for expensive oil
The Indian rupee, Turkish lira and currencies of several emerging markets are usually among the most exposed when oil prices jump. For them, expensive energy means larger current-account deficits, fiscal pressure and higher inflation risk. If the central bank defends the currency with higher rates, the economy slows further; if it does not, imported inflation can intensify.
The Logical Indian reported that the rupee fell to a record 95.63 per dollar amid the U.S.-Iran conflict and the surge in oil prices. The move is especially sensitive for India because the country imports a large share of the oil it consumes, and currency changes quickly feed into fuel costs, transport and inflation expectations.
Gold and the franc compete with the dollar
Traditional safe assets have also attracted demand, but their performance has been uneven. Gold usually benefits from geopolitical risk, yet a stronger dollar and higher U.S. bond yields can cap its gains. The Swiss franc remains a haven currency, but its upside depends on Swiss National Bank policy and the authorities’ tolerance for excessive appreciation.
Asharq Al-Awsat reported that gold fell from a three-week high as fading hopes for a U.S.-Iran peace deal lifted both the dollar and oil, complicating the outlook for U.S. interest rates. The move shows that haven assets do not always rise together: the dollar can gain because of liquidity, while gold can suffer from rate expectations.
The petrodollar system faces a stress test
The Gulf war has revived questions about the dollar’s role in global oil trade. The petrodollar system usually refers to the practice of pricing and settling most oil trade in U.S. dollars and recycling part of the proceeds into dollar assets. For now, the crisis has strengthened the dollar because market participants are seeking liquidity and safety, not alternative settlement arrangements.
The longer-term risk is different. If the war drags on and energy exporters and importers use alternative currencies for more contracts, the dollar system could become less monolithic. That does not imply a rapid end to dollar dominance, but it raises the relevance of the yuan, regional currencies and bilateral settlement channels in energy trade.
Central banks face an inflation trap
Before the war, many markets were built around a gradual move toward lower interest rates. The energy shock has disrupted that logic. Expensive oil acts like a tax on consumers and weakens demand, but it also raises inflation. Under normal conditions, weaker demand would allow central banks to ease policy; under oil-driven inflation, they risk losing credibility if they cut too soon.
FXEmpire described the problem as a pause in the lower-rates narrative: expensive energy destroys demand but prevents policymakers from freely reducing rates while inflation expectations remain unstable. For currencies, that means interest-rate differentials are again central; countries that can maintain higher rates without recession receive currency support.
The market searches for a new balance
The new currency equilibrium will depend on three variables: the duration of the war, the stability of oil flows and the reaction of central banks. If shipments through the Strait of Hormuz normalize, the dollar could lose part of its haven premium and energy-importer currencies may get relief. If the conflict drags on, markets will keep reallocating capital toward the dollar, commodity-linked currencies and countries with strong external balances.
For investors, this is not just a story about exchange rates. It is a test of global payments, energy trade and monetary policy architecture. As International Investment experts report, the main risk is that the currency market is no longer reacting only to military headlines: it is starting to reprice the long-term cost of energy, the reliability of trade routes and the ability of countries to defend their currencies without sacrificing growth.
FAQ on currencies and the Gulf war
Why does the Gulf war affect currencies?
Because the region is tied to global oil and gas supply. When energy prices rise, exporters receive more foreign-currency revenue, while importers face higher costs, inflation and exchange-rate pressure.
Why does the dollar strengthen during crises?
The dollar is the world’s main reserve currency and the deepest instrument for payments, debt and capital preservation. Investors often buy dollar assets during periods of stress.
Which currencies benefit from expensive oil?
Currencies of commodity-exporting countries often receive support if higher prices come with stable supply. But even exporters can face pressure if infrastructure or logistics are disrupted.
Why do energy-importer currencies weaken?
Importers need more foreign currency to buy oil and gas. That worsens trade balances, raises inflation and can force central banks to choose between defending the currency and supporting growth.
What is a currency swap line?
It is an agreement that allows access to foreign-currency liquidity, usually dollars, in exchange for domestic currency. Swap lines help reduce stress in financial markets.
Could the war weaken the petrodollar system?
In the short term, the crisis is more likely to support the dollar. Over the longer term, prolonged instability could increase interest in alternative settlement channels, but replacing the dollar system would take many years.