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

Published by Global Banking & Finance Review

Posted on May 8, 2026

4 min read

· Last updated: May 8, 2026

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Dollar weakens as investors pin hopes on a resolution to the US-Iran conflict

Market Reactions and Currency Movements Amid Middle East Tensions

By Saqib Iqbal Ahmed

NEW YORK, May 8 (Reuters) - The dollar eased on Friday, set for a second straight weekly fall as investors stayed cautiously optimistic about a swift end to the Middle East conflict, after President Donald Trump said the ceasefire remained in place despite renewed U.S.-Iran hostilities.

The United States said it expected an Iranian response as soon as Friday to its latest proposal to end the war in the Gulf, even as U.S. and Iranian forces traded fire in the region and the United Arab Emirates came under renewed attack.

Analysts said investors were taking heart from the fact that while oil prices were higher, a fragile ceasefire broadly held.

Investor Sentiment and Dollar Index Performance

"The U.S. has strongly suggested it is trying to avoid escalation and wants the ceasefire intact," said Kyle Chapman, FX markets analyst at Ballinger Group in London.

The dollar index measured against key peers fell 0.4% to 97.877, after hitting 97.623 earlier this week, its lowest level since February 27, a day before the war started. It was set for a weekly drop of 0.3% after falling about as much the previous week.

"We are bearish on the DXY (dollar index) as we think supported risk appetite and additional risk premium should push the DXY to 95 in the coming months," strategists at Morgan Stanley said in a note.

The euro was up 0.5% at $1.17808 , poised to end the week a touch firmer. 

Shift Toward Riskier Currencies

Investors, who had flocked to the safe-haven dollar and sold currencies of oil import-dependent economies such as Japan and the euro area after oil prices surged following Iran's effective closure of the Strait of Hormuz, drifted toward riskier currencies in recent weeks as hopes grew for a resolution to the Iran conflict.

Labor Market Resilience

U.S. Employment Data and Fed Expectations

The U.S. currency was little-moved after data on Friday showed U.S. employment increased more than expected in April while the unemployment rate held steady at 4.3%, pointing to labor market resilience and reinforcing expectations that the Federal Reserve would leave interest rates unchanged for some time.

Payrolls have been choppy since mid-2025, alternating between gains and losses. 

Analyst Insights on Payroll Volatility

"The payrolls volatility this year should steer the market away from placing too much emphasis on a single print - the trend still leans towards softening, and it points firmly to a Fed on hold this year," Ballinger Group's Chapman said.

Yen Supported by Intervention Risks

Japanese Policy and Market Reactions

  Traders remained focused on the Japanese yen after recent interventions and verbal warnings from Tokyo kept sharp selling at bay. Against the yen, the dollar was 0.2% weaker at 156.695.

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. 

Impact of Middle East Tensions on Yen

"The reports of clashes between the U.S. and Iran in the Strait of Hormuz certainly raises the risk of a renewed jump in crude oil prices that scuppers Japan’s efforts to halt a move in dollar/yen through the 160-level," said Derek Halpenny, head of research, global markets at MUFG.

Analysts argued that until macro and technical conditions change, traders are likely to keep testing the Bank of Japan's resolve. 

Riskier Currencies Rise

Pound, Aussie, Kiwi and Bitcoin Performance

The pound and UK government bonds climbed on Friday after British Prime Minister Keir Starmer said he would not resign despite bruising losses for his ruling Labour Party in local elections.

The pound was up 0.6% at $1.3626.

The Australian dollar rose 0.5% to $0.72455, and the New Zealand kiwi was 0.4% higher at $0.59615, both on track to post gains for the week on improved risk appetite. 

Leading cryptocurrency bitcoin was about flat on the day at $80,046, not far from the more than three-month high of $82,793 touched on Wednesday.  

(Reporting by Saqib Iqbal Ahmed; Additional reporting by Stefano Rebaudo in London; Editing by Shri Navaratnam, Kim Coghill, William Maclean, Nick Zieminski and Andrea Ricci )

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.

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