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Dollar at six-week high on rate-hike bets, Iran war uncertainty

Published by Global Banking & Finance Review

Posted on May 20, 2026

4 min read

· Last updated: May 20, 2026

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Dollar Rises to Six-Week High Amid Fed Rate-Hike Bets and Iran Conflict Fears

Market Reactions and Currency Movements

By Ankur Banerjee

Dollar Strengthens on Fed Rate-Hike Expectations

SINGAPORE, May 20 (Reuters) - The U.S. dollar was steady near a six-week high on Wednesday as investors come to terms with the possible need for higher interest rates to tackle inflation due to the Iran war, pushing the Japanese yen back into the intervention zone.

Impact of Middle East Conflict on Global Markets

The uncertainty over when the Middle East war may end has weighed on sentiment, fanned inflation fears and triggered a global bond selloff, with the yield on the U.S. 30-year Treasury bond hitting its highest level since 2007. [US/]

President Donald Trump said the United States may need to strike Iran again but suggested Iran wants a deal to end the war that has roiled markets and sent energy prices soaring.

Performance of Major Currencies

Euro and British Pound

The euro last bought $1.1608, having touched its lowest level since April 8 in the previous session. The British pound was at $1.3398, not far from a six-week low it touched earlier this week.

Australian and New Zealand Dollars

The Australian dollar, often seen as a barometer for risk sentiment, was 0.14% lower at $0.7097, while the New Zealand dollar fell 0.24% at $0.5822.

Dollar Index and Safe-Haven Demand

Against a basket of currencies, the dollar was steady at 99.306. The index is up more than 1% in May due to safe-haven demand and markets pricing in chances of the Federal Reserve hiking interest rates by the end of the year.

Federal Reserve Outlook and Market Expectations

Rate Hike Probabilities

Traders are now pricing in an over 50% chance of a hike in December, CME FedWatch showed, in a sharp reversal from two rate cuts expected before the war. Investor focus will be on the minutes of the Fed's last meeting due later in the day.

Analyst Insights

Carol Kong, currency strategist at Commonwealth Bank of Australia, expects the minutes to be hawkish, pushing the dollar up further, noting that more Fed policymakers have warned about high U.S. inflation since the last Fed meeting in April.

"We continue to expect the FOMC to start a tightening cycle in December," Kong said.

Geopolitical Tensions and Commodity Markets

Strait of Hormuz and Oil Prices

The fragile ceasefire agreed in April has mostly held, although markets remain worried as the Strait of Hormuz - a key route for global supplies of oil and other commodities - is still effectively closed.

Brent crude futures were at $110.8 per barrel in early trading, well above the levels before the war started at the end of February.

Yen Intervention and Japanese Market Response

Recent Yen Movements

The dollar's rise has pushed the yen back near the 160-per-dollar level that led to Japanese officials last month launching their first currency market intervention in nearly two years.

Japanese Government Actions

Tokyo had stepped in to stem the yen's slide in several bouts of intervention at the end of April and early May, sources told Reuters, but the yen's strength did not last long. It was last at 159.03 per U.S. dollar, its weakest level since April 30.

Expert Commentary on Yen Volatility

"Near term, excessive volatility is key while 160/161 remains the line to watch," said Christopher Wong, currency strategist at OCBC.

"Intervention risk should make markets more cautious about chasing dollar/yen higher, but unless U.S. Treasury yields and the broad USD soften, official action may only temporarily slow the move rather than reverse it," he said.

(Reporting by Ankur Banerjee in Singapore; Editing by Jamie Freed)

Key Takeaways

  • The 30‑year US Treasury yield climbed above ~5.19%, its highest level since July 2007, fueled by inflation worries and Iran war uncertainties (riotimesonline.com).
  • CME FedWatch data show market‑implied probabilities for a Fed rate hike by year‑end exceed 50%, reversing earlier expectations of cuts (riotimesonline.com).
  • Persistent energy price spikes and Strait of Hormuz disruptions stoke global inflation fears, reinforcing bond selloffs and safe‑haven currency demand (riotimesonline.com)

References

Frequently Asked Questions

Why is the US dollar at a six-week high?
The US dollar is at a six-week high due to expectations of higher interest rates to combat inflation amid ongoing uncertainty from the Iran war.
How has the Iran war affected global financial markets?
The Iran war has fanned inflation fears, triggered a global bond selloff, and increased demand for the dollar as a safe-haven asset.
What impact has the conflict had on Treasury yields?
Yields on the US 30-year Treasury bond have reached their highest level since 2007 due to market uncertainty and inflation concerns.
Is there intervention in the currency market?
Yes, Japanese officials have intervened to stem the yen's decline as the dollar/yen exchange neared levels that prompted action.
What are investors watching for next?
Investors are closely monitoring the minutes of the Federal Reserve's last meeting for signals on future interest rate hikes.

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