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Dollar firms as oil climbs, bond rout saps risk appetite

Published by Global Banking & Finance Review

Posted on May 18, 2026

3 min read

· Last updated: May 18, 2026

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Dollar retreats as traders focus on Iran, Fed policy

Market Reactions to Geopolitical Tensions and Federal Reserve Policy

By Karen Brettell

Dollar Movement Amid Iran War Developments

NEW YORK, May 18 (Reuters) - The dollar dipped against most major currencies on Monday as traders evaluated whether progress in ending the Iran war is likely in the near-term and whether central bankers will need to tighten policy if oil prices remain elevated.

Oil Prices and Sanctions Impact

Oil prices edged up about 2% to a two-week high in volatile trade on Monday as worries over supply disruption from the Iran war offset a report the U.S. had agreed to waive sanctions on Iranian crude during talks.

Federal Reserve Policy and Market Expectations

The dollar gained last week as a Treasury yields rose sharply on fears that energy costs will feed through to consumer price inflation and lead to a Federal Reserve rate hike.

Shifting Expectations for Rate Hikes

"Although expectations regarding the Fed had shifted significantly towards a more restrictive monetary policy from the outset, market participants were still reluctant to bet on interest rate hikes. This changed last week, with expectations regarding the Fed shifting most markedly among the G10," said Commerzbank strategist Michael Pfister.

New Fed Chair and Inflation Concerns

Some of the market moves are also likely due to investors testing whether Kevin Warsh, the newly appointed Fed chair, will react to higher inflation if needed, said Lou Brien, market strategist at DRW Trading. "They're going to want to see that Warsh is his own man rather than the president's man at the Fed."

Warsh has argued there is room to lower rates, though persistent inflation - driven in part by the war in the Middle East - could frustrate those hopes. Markets are pricing in a 51% chance that the Fed will raise rates by December.

Currency Performance Overview

The euro was last up 0.09% at $1.1636 and sterling strengthened 0.66% to $1.3409.

The dollar index, which tracks the U.S. currency against six others, dipped 0.14% to 99.13, having posted its strongest weekly performance in three months last week.

Japanese Yen and Government Response

The Japanese yen weakened 0.14% against the greenback to 158.99 per dollar, its weakest since April 30. 

Japanese officials intervened several times in late April and into early May, which helped the yen to strengthen, though the currency has since surrendered much of those gains.

Japan's government is likely to issue debt as part of funding for a planned extra budget to try to limit the economic impact of the Middle East war, a government source with direct knowledge of the deliberations told Reuters on Monday.

(Additional reporting by Jiaxing Li in Hong Kong and Amanda Cooper in London; Editing by Susan Fenton, Chizu Nomiyama, Barbara Lewis and Cynthia Osterman)

Key Takeaways

  • Oil prices surged over 1%, with Brent crude hitting around $110.60 a barrel, after a drone attack on the UAE’s Barakah nuclear power plant and stalled U.S.–Israeli–Iran peace efforts (investing.com).
  • Global bond markets are under pressure as U.S. 10-year Treasury yields climbed to approximately 4.60%, marking the largest weekly jump since April 2025 amid inflation fears (bloomberg.com).
  • The dollar held firm across major currencies, supported by elevated yields and risk averse sentiment; the yen weakened to about 158.8 per dollar, reinforcing concerns over potential Japanese FX intervention (reddit.com).

References

Frequently Asked Questions

Why is the dollar firming against other major currencies?
The dollar is firming due to rising oil prices, increased Middle East tensions, and a global bond selloff which have reduced risk appetite.
How are oil prices affecting the currency markets?
Higher oil prices, driven by Middle East tensions and supply disruptions, are boosting the dollar while exerting pressure on risk-sensitive currencies.
What impact has the global bond selloff had on markets?
The bond selloff has dented risk sentiment, keeping treasury yields elevated and prompting investors to favor the dollar.
Is there a risk of Japanese intervention in currency markets?
Renewed yen weakness has kept traders alert for possible Japanese intervention to support their currency.
What factors are influencing the Federal Reserve's outlook?
Persisting inflation concerns and ongoing financial tightening are central to the Fed's outlook, with investors watching for signals in upcoming meeting minutes and economic data releases.

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