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Dollar slumps as signs of deal to reopen Hormuz spur risk appetite - Finance news and analysis from Global Banking & Finance Review
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Dollar slumps as signs of deal to reopen Hormuz spur risk appetite

Published by Global Banking & Finance Review

Posted on May 25, 2026

4 min read

· Last updated: May 25, 2026

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Dollar drifts lower as oil falls on Hormuz deal optimism

Market Reactions and Economic Developments

By Gregor Stuart Hunter and Lucy Raitano

SINGAPORE/LONDON, May 25 (Reuters) - The dollar dropped against major currencies on Monday as hopes of a deal to reopen the Strait of Hormuz pushed oil prices below $100 per barrel, even as the U.S. and Iran played down the chances of reaching an agreement soon.

Many markets - including in the U.S., Hong Kong, Britain and much of the rest of Europe - were closed for public holidays, reducing liquidity.

Currency Movements

Against the yen, the dollar was down 0.2% at 158.91 yen.

Japanese Economic Measures

Japan will build up an extra $19 billion in reserves to subsidise fuel costs and help tackle cost-of-living pressures, Prime Minister Sanae Takaichi said on Monday, while looking to assuage bond market concerns by promising no extra borrowing overall. The supplementary budget was first reported earlier this month.  

Major Currency Pairs

The euro rose 0.33% to $1.1641 and the British pound gained 0.55% to $1.3499. The Australian dollar advanced 0.58% to $0.717, while its kiwi counterpart tacked on 0.5% to $0.5874.

The U.S. dollar index fell about 0.3% to 98.969.

Geopolitical Factors and Oil Prices

U.S. Agreement with Iran Drawing Closer?

As diplomatic efforts to find a resolution to the Iran war continue, U.S. Secretary of State Marco Rubio said there would either be a good agreement or Washington would deal with the country in "another way".

Iran's foreign ministry spokesperson said conclusions had been reached on many topics discussed in a potential memorandum of understanding with the U.S., but this did not mean Tehran was close to signing an agreement.

Market Analyst Perspectives

"If and when a peace deal is secured, the USD will weaken for a period. However, once that impulse washes through, the USD will re‑strengthen because of its better fundamentals against the major currencies," wrote Samara Hammoud, international economist and currency strategist at CBA.

Oil Market Response

Oil markets tumbled on hopes of a peace deal, with Brent crude prices down 5% to $98.43 a barrel, while U.S. West Texas Intermediate was at $88.83 a barrel, off 4.8%.

Conflicting Signals Over Deal Likelihood

Over the weekend, there were conflicting signals over the likelihood of a deal. U.S. President Donald Trump said on social media on Saturday that a memorandum of understanding on a peace deal with Iran had been "largely negotiated," with both countries and mediators in Pakistan reporting progress.

However, on Sunday Trump said on Truth Social that the U.S. blockade on Iranian ships in the Strait of Hormuz would "remain in full force and effect until an agreement is reached, certified, and signed".

"Markets have become conditioned to be incredibly patient on a tangible breakthrough, but the base case of a deal remains firm, with the weekend news providing further conviction, even if the timing remains unclear," said Chris Weston, head of research at Pepperstone Group Ltd in Melbourne.

He added that if Brent drops towards $90 this would give risk assets renewed life as short-term inflation expectations fall and implied rate hike bets for 2027 are pared back.

Central Bank Policy and Upcoming Data

European Central Bank policymaker Yiannis Stournaras said on Monday that if euro zone inflation overshoots the ECB target temporarily but significantly, there should be a cautious adjustment of monetary policy in a more restrictive direction.

Traders are looking ahead to some key data due this week including a U.S. ADP employment report on Tuesday and euro zone confidence surveys on Thursday.

Cryptocurrency Market Update

Elsewhere, bitcoin was up 0.9% at $77,271.20, while ether rose 1.1% to $2,114.30.

(Reporting by Gregor Stuart Hunter in Singapore and Lucy Raitano in London. Editing by Aidan Lewis, Gareth Jones and Mark Potter)

Key Takeaways

  • Signs of a U.S.–Iran memorandum of understanding (MOU) to reopen the Strait of Hormuz have buoyed risk sentiment and driven down oil prices below $100 a barrel (axios.com).
  • Despite optimism, the Trump administration cautioned that the U.S. blockade remains until a deal is finalized, limiting the deal’s immediate impact (za.investing.com).
  • Currencies sensitive to risk—like the AUD and NZD—benefited from USD weakness, while oil-sensitive sectors remain reactive amid market scepticism over the deal's durability (axios.com).

References

Frequently Asked Questions

Why did the dollar slump at the start of Asian trading?
The dollar fell due to hopes of a deal to reopen the Strait of Hormuz, which boosted risk appetite and hurt demand for the USD.
How did the potential Hormuz deal affect oil prices?
Optimism over a possible deal drove Brent crude prices below $100 per barrel, with both Brent and WTI seeing significant drops.
What was the reaction of other currencies to the dollar's decline?
Currencies like the yen, euro, pound, Australian dollar, and New Zealand dollar all gained strength against the US dollar.
Did traders believe a peace deal with Iran was likely soon?
Traders remained cautious, showing skepticism about a breakthrough, although they considered a deal as a strong base case.
What impact did the news have on cryptocurrencies?
Bitcoin and ether both traded higher, reflecting a boost in risk sentiment across financial markets.

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