Dollar firms as US-Iran hostilities flare, yen steadied by intervention risk
Finance

Dollar firms as US-Iran hostilities flare, yen steadied by intervention risk

Published by Global Banking & Finance Review

Posted on May 8, 2026

3 min read

· Last updated: May 8, 2026

Add as preferred source on Google

Dollar Strengthens on US-Iran Conflict, Yen Stabilized by Tokyo’s Intervention Risk

Market Reactions to Geopolitical Tensions and Currency Movements

By Jiaxing Li

Dollar Rises Amid US-Iran Tensions

HONG KONG, May 8 (Reuters) - The dollar started Friday's Asian session on a firm footing against most major currencies after renewed hostilities broke out between the U.S. and Iran, while the Japanese yen held largely steady following fresh verbal jawboning from Tokyo.

The U.S. and Iran exchanged fire and traded barbs again on Thursday, piling fresh pressure on a fragile month-long ceasefire as Iran reviews Washington's proposal to end the war.

Impact on Oil Prices and Risk Sentiment

Oil prices jumped, with U.S. crude futures rising as much as 3% in early trading, adding to the risk-off mood in currency markets.

The dollar index measured against key peers was a touch firmer at 98.235. The rising tensions lifted the greenback for a second day from an over two-month low struck early in the week on hopes of a peace deal, putting it on track to finish the week largely flat.

"The path towards a lasting agreement is anything but linear," wrote Chris Weston, head of research at Pepperstone.

"Traders have had to rethink the assumptions on the trajectory of the conflict and the normalization of vessel flows through Hormuz that had been made over the last couple of sessions."

Upcoming US Economic Data

Markets are also bracing for the U.S. non-farm payrolls report later on Friday, and it may take an outlier number, particularly a sufficiently weak one, to really move the dial on dollar volatility, he added.

Performance of Other Major Currencies

Sterling and Euro Movements

Sterling traded at $1.3555, headed for its first weekly loss since March, as investors awaited local election results that could heap further political pressure on Prime Minister Keir Starmer.

The euro was steady at $1.1727, poised to end the week a touch firmer.

Australian and New Zealand Dollars

The Australian dollar fetched $0.72059, and the New Zealand kiwi changed hands at $0.59365, both on track to post a winning week on improved risk appetite in earlier days.

Yen Stability and Japan’s Intervention Policy

Traders remained focussed on the Japanese yen after recent interventions and verbal warnings from Tokyo kept sharp selling at bay. The yen was largely steady at 156.995 in early Asian deals and is set to end the week on a steady footing.

Japan’s Approach to Currency Intervention

Japan faces no constraints on how often it can intervene in currency markets and is in daily contact with U.S. authorities, its top currency diplomat said on Thursday, reinforcing Tokyo's resolve to defend the embattled yen.

"Against the current backdrop of elevated energy prices and rising yields, Japanese intervention can only act as a safety harness on the yen's descent, but it can't pull it to safety," said Tony Sycamore, market analyst at IG.

Future Outlook for the Yen

Until macro and technical conditions change, the yen is likely to keep testing the Bank of Japan's resolve, he added.

(Reporting by Jiaxing Li in Hong KongEditing by Shri Navaratnam)

Key Takeaways

  • U.S.–Iran hostilities reignited around the Strait of Hormuz, sparking a risk‑off tone and U.S. dollar strength.
  • Oil prices surged (U.S. crude up ~3%), reinforcing dollar gains and weighing on risk-sensitive FX.
  • The yen remains supported due to Japan’s verbal warnings and likely intervention—even beyond the psychologically key 160 level.
  • Markets are bracing for the U.S. non‑farm payrolls report later today (May 8, 2026), a potential catalyst for renewed dollar volatility.

Frequently Asked Questions

Why did the US dollar strengthen in early Asian session?
The US dollar strengthened due to renewed hostilities between the US and Iran, which created a risk-off mood in currency markets.
How did the Japanese yen perform amid market volatility?
The Japanese yen held largely steady, supported by recent interventions and verbal warnings from Tokyo to prevent sharp declines.
What impact did US-Iran tensions have on oil prices?
US-Iran tensions caused oil prices, especially US crude futures, to jump by as much as 3% in early trading.
What are traders watching to gauge further currency movements?
Traders are closely monitoring the US non-farm payrolls report, as a weak result could increase dollar volatility.
What is Japan's approach to currency market intervention?
Japan faces no constraints on intervening in currency markets and maintains daily contact with US authorities to support the yen.

Tags

Related Articles

More from Finance

Explore more articles in the Finance category