Key Takeaways:
The Iran war reached its 100th day on June 7 with oil above $100 a barrel, the dollar at multi-month highs, and no end in sight to the region's worst conflict in decades.
The Iran war reached its 100th day on June 7 with Brent crude holding above $100 a barrel and the U.S. Dollar Index at elevated levels, as the conflict reshaped global energy flows and investor risk appetite across all major asset classes.
"The persistence of the dollar's strength beyond the initial safe-haven reaction suggests markets are pricing in a fundamentally altered risk landscape," said Lisa Gable, former U.S. ambassador and chairwoman of World In 2050.
The U.S. Dollar Index has climbed as geopolitical tensions, strong employment data, and expectations for higher-for-longer interest rates reinforced demand for dollar-denominated assets. Brent crude has remained above $100 since the Feb. 28 U.S.-Israeli air strikes on Iran triggered a regional conflict that disrupted the Strait of Hormuz, a waterway handling about 21% of global oil trade. The United States imposed a naval blockade on Iran on April 13, and Iranian forces have fired on vessels attempting to transit the strait.
The 100-day milestone underscores how a conflict that began with a single military operation has cascaded into a multi-front crisis — from tit-for-tat missile exchanges with Gulf allies to supply chain disruptions that have pushed food and energy costs higher worldwide. The United Nations' World Food Program has warned that as many as 45 million people could face acute food insecurity if oil prices stay at current levels through June, with Afghanistan, Somalia and Sri Lanka among the most affected.
Oil at $100 Reshapes the Inflation Outlook
Brent crude has traded above $100 a barrel for most of the conflict's duration, a level not sustained for this length of time since the 2022 Russia-Ukraine war. The Strait of Hormuz disruption has constrained global energy flows at a time when the U.S. has sought to maintain stable supply through increased domestic production. The United States remains one of the world's leading oil and natural gas producers, and the Trump administration has emphasized energy expansion as a pillar of its economic strategy.
Higher energy costs have fed through to broader inflation expectations, reducing pressure on the Federal Reserve to cut interest rates aggressively. Markets now view the U.S. as likely to maintain relatively attractive yields compared to many international competitors, providing ongoing support for the dollar. The last time oil held above $100 for a comparable stretch was in mid-2022, when the Fed was in the midst of its most aggressive tightening cycle in decades.
Dollar Strength and the Safe-Haven Bid
The dollar's rally reflects more than just oil prices. The U.S. economy has shown resilience through the conflict, with employment, consumer spending and business investment all exceeding expectations. That relative strength stands out against Europe's structural economic challenges, Japan's demographic pressures and China's property market concerns.
The Trump administration has pointed to policies on deregulation, domestic manufacturing and energy production as factors supporting confidence in the U.S. economy. Supporters argue these measures have improved economic fundamentals, while critics note that safe-haven flows during geopolitical crises have historically benefited the dollar regardless of which administration is in power.
Military escalation in recent days has reinforced the safe-haven bid. On June 5-6, the U.S. and Iran exchanged strikes — Iran launched ballistic missiles toward Kuwait and Bahrain, while U.S. Central Command struck Iranian coastal radar stations in self-defense. CENTCOM said it intercepted six of seven Iranian missiles and that the U.S. Navy's Fifth Fleet headquarters in Bahrain suffered no damage. President Donald Trump said Iran now retains about 21% to 22% of its prewar missile stock.
What Comes Next
The trajectory of oil, the dollar and broader risk assets will depend on whether the conflict escalates or moves toward a negotiated settlement. Trump has expressed optimism that the war could end soon, though peace talks have repeatedly stalled. The U.S. approved a $1.98 billion foreign military sale to Kuwait for counter-drone systems on June 5, signaling preparation for a prolonged engagement.
For investors, the 100-day mark offers a moment to assess how deeply the conflict has repriced assets. If oil stays above $100 and the dollar remains strong, emerging-market currencies and import-dependent economies will face continued pressure. If a cease-fire takes hold, the unwind could be rapid — but after 100 days, markets are no longer pricing for that scenario.
This article is for informational purposes only and does not constitute investment advice.
