Dollar near one-week high as US-Iran tensions flare, yen nears intervention zone - Finance news and analysis from Global Banking & Finance Review
Finance

Dollar near one-week high as US-Iran tensions flare, yen nears intervention zone

Published by Global Banking & Finance Review

Posted on May 28, 2026

3 min read

· Last updated: May 28, 2026

Add as preferred source on Google

Dollar Holds Near One-Week High as US-Iran Tensions Impact Currency Markets

US-Iran Tensions Drive Currency Market Volatility

By Jiaxing Li

Dollar Strengthens Amid Geopolitical Uncertainty

HONG KONG, May 28 (Reuters) - The dollar held firm near a one-week high on Thursday on a Reuters report that the U.S. had carried out new strikes in Iran targeting a military site, while the yen softened towards a level that  triggered central bank intervention last month.

The strikes complicated peace talks underway between Washington and Tehran. Earlier on Wednesday, President Donald Trump had said he was "not satisfied" on a deal with Iran, and dismissed an Iranian state media report that Iran and Oman would jointly manage shipping through the Strait of Hormuz as part of a peace deal. 

Impact on Oil Prices and Safe-Haven Demand

Oil prices rebounded and the safe-haven dollar steadied as hopes of a swift resolution faded, with investors now increasingly expecting the greenback to break higher as the Federal Reserve shifts its focus to battling inflation amid elevated energy prices.

Expert Insights on Geopolitical Risks

"Geopolitics and the subsequent inflation risks remain a key concern," Alex Saunders, Citi's head of global quant macro strategy, wrote. "We continue to see a trim in the USD underweight."

Major Currencies React to Market Developments

The euro was a shade lower at $1.1620, while the pound was down 0.1% at $1.34176. 

The risk-sensitive Australian dollar weakened 0.2% to $0.71305 and the New Zealand dollar was largely flat at $0.58965. 

The dollar index, which measures the greenback's strength against a basket of six major peers, was steady at 99.288, near its highest level since May 22. 

Upcoming US Economic Data

Markets will now look ahead to today's release of the Fed's preferred inflation gauge, the core PCE deflator, which will help shape the broader interest rate outlook.

Yen Weakens as Intervention Concerns Return

The yen weakened to as far as 159.60 per dollar on Thursday, the lowest since April 30 and within sight of the 160 level that triggered intervention by Japanese authorities last month. 

Effectiveness of Previous Intervention

That intervention bought policymakers some breathing room, but questions linger over its lasting impact, said Tony Sycamore, market analyst at IG. 

"The broader question is whether it was worth it for what essentially amounts to just a single month's relief. And furthermore, will authorities have the stomach to write a similar-sized cheque if the 160 level is breached again in the coming sessions?" he said.

BOJ Policy Outlook

Markets are pricing a roughly 70% chance of a quarter-point interest rate rise at the BOJ's June 15–16 policy meeting, LSEG data showed. 

(Reporting by Jiaxing Li; Editing by John Mair)

Key Takeaways

  • US strikes in Iran intensified geopolitical tensions, supporting the safe‑haven US dollar and lifting oil prices, which may complicate peace negotiations.
  • The yen dropped to its weakest since April and edged toward the intervention‑trigger ¥160 level, raising speculation of further Japanese FX action ahead of BOJ’s June meeting (70% odds of a 25bp hike).
  • Markets are now focused on the April core PCE deflator release—scheduled May 29 (08:30 ET)—the Fed’s preferred inflation gauge that will be pivotal for interpreting future US monetary policy.

Frequently Asked Questions

Why is the US dollar near a one-week high?
The US dollar is near a one-week high due to new US strikes in Iran and ongoing geopolitical tensions, raising demand for safe-haven assets.
What triggered the yen to approach the intervention zone?
The yen weakened towards 160 per dollar, a level where Japanese authorities intervened last month to stabilize the currency.
How are US-Iran tensions affecting markets?
US-Iran tensions have complicated peace talks, increased market volatility, and led investors towards the dollar for safety.
What is the significance of the Fed's core PCE deflator release?
The core PCE deflator is the Fed's preferred inflation gauge and will influence the outlook for US interest rates.
How did oil prices respond to the recent events?
Oil prices rebounded as hopes for a swift US-Iran resolution faded due to new military strikes and persistent tensions.

Tags

Related Articles

More from Finance

Explore more articles in the Finance category