Economy May 28, 2026 12:43 AM

Markets React as US-Iran Exchanges Resume; Oil Jumps and Asian Stocks Slide

Renewed strikes between Washington and Tehran push oil higher, lift the dollar and weigh on Asian equities as fears over inflation return

By Jordan Park

Global markets turned cautious after fresh hostilities between the United States and Iran, with air raid alerts in Kuwait, a sharp rise in Brent crude and broad weakness across Asian equities. Safe-haven demand lifted the dollar and U.S. Treasury yields, while central bank commentary flagged the risk that an energy shock could prolong inflation even if the conflict is resolved.

Markets React as US-Iran Exchanges Resume; Oil Jumps and Asian Stocks Slide

Key Points

  • Renewed U.S.-Iran strikes and air raid sirens in Kuwait pushed Brent crude up 3.7% to $97.79 and rattled markets.
  • Asia-Pacific equities fell, with MSCI’s regional index down 1.8% and South Korea’s KOSPI off 2.7%; U.S. equity futures were lower.
  • Safe-haven demand lifted the U.S. dollar (index up 0.2% at 99.506) and the U.S. 10-year Treasury yield (up 5.1 bps to 4.53%), while the ECB’s chief economist warned the energy shock could leave a persistent inflationary impact.

Summary

Equity markets and energy prices moved sharply after renewed exchanges between U.S. and Iranian forces, with air raid sirens sounding in Kuwait and the Islamic Revolutionary Guard Corps saying it struck a U.S. airbase. Brent crude spiked and investors sought safer assets, sending the dollar higher and nudging U.S. Treasury yields up. Market futures in Europe opened softer, while a senior European Central Bank official warned the energy shock could leave a lingering imprint on inflation.


Market moves and immediate drivers

Stocks fell across Asia as oil surged and the dollar strengthened following a fresh round of U.S.-Iran attacks. Brent crude rallied 3.7% to $97.79 after Iran’s Islamic Revolutionary Guard Corps said it had attacked a U.S. airbase and warned that any further U.S. strikes would provoke "a more decisive response". The comments and the strikes tightened risk sentiment, sustaining pressure on energy markets and risk assets.

MSCI’s broad index of Asia-Pacific shares outside Japan dropped 1.8%, with South Korea’s KOSPI down 2.7% leading declines. U.S. equity futures signalled softer opens: S&P 500 e-mini futures traded about 0.3% lower and Nasdaq e-mini futures were down roughly 0.7%.

Kuwait reported air raid sirens, and the country’s army said it was intercepting hostile missile and drone threats. Those developments underline how regional security events are affecting nearby states and global shipping lanes, keeping the Strait of Hormuz and related maritime traffic risks elevated.


Safe havens and fixed income

Investors increased allocations to traditional safe havens. The U.S. dollar index rose 0.2% to 99.506 as market participants sought stability. At the same time, the U.S. 10-year Treasury yield climbed 5.1 basis points to 4.53% amid renewed concerns about potential inflationary effects stemming from higher oil prices.


Policy and economic commentary

Philip Lane, the European Central Bank’s chief economist, said in Tokyo that the energy shock produced by the Middle East conflict "will probably have a persistent impact on inflation even if there is a solution to the war." That assessment underscores a policy risk for central banks as they weigh the outlook for inflation and growth while geopolitical tensions affect commodity prices.


Sanctions and regulatory developments

The United States added the Persian Gulf Strait Authority to its Specially Designated Nationals list, the Treasury Department’s website showed. The Persian Gulf Strait Authority is a body Iran created to manage requests for passage through the Strait of Hormuz, and its inclusion on the SDN list represents a new round of Iran-related U.S. sanctions.


European trading open and near-term market calendar

In early European trading, pan-region futures were down about 1.1%, German DAX futures slipped 0.9% and FTSE futures traded roughly 1% lower as investors digested the overnight escalation.

Items that could shape markets later in the day include a slate of corporate earnings from SSE PLC, CD Projekt SA, Costco, Royal Bank of Canada and Dell, France’s producer price data for April and sovereign debt auctions in Germany (15-year and 30-year) and the U.K. (4-year, 7-year and 13-year maturities).


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Implications by sector

  • Energy: Higher oil prices directly affect inflation outlook and energy-sector valuations.
  • Financials and sovereign debt: Rising yields and volatility may influence bank performance and government funding costs in upcoming auctions.
  • Equities: Risk assets, particularly in Asia, have shown sensitivity to geopolitical developments, with futures indicating further downside pressure in Europe and the U.S.

Conclusion

Renewed U.S.-Iran hostilities have translated into higher oil prices, firmer safe-haven flows and softer equities in Asia, with European futures opening in negative territory. Central bank commentary and new sanctions add to a complex backdrop that could prolong inflationary pressures tied to energy even if diplomatic outcomes change the security picture.

Risks

  • Persistent elevation of oil prices that could sustain inflationary pressures, affecting consumer prices and central bank policy decisions - primarily impacting the energy sector and inflation-sensitive sectors.
  • Escalation of regional hostilities and interception of missiles and drones, which could further disrupt shipping through the Strait of Hormuz and weigh on global trade and energy markets - affecting shipping, commodities and regional economies.
  • New U.S. sanctions on Iran-linked entities (addition of the Persian Gulf Strait Authority to the SDN list) could complicate commercial activity and add regulatory risk for companies operating in or near the region - affecting trade, shipping and financial services.

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