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Dollar at week-high after US resumes attacks on Iran - Finance news and analysis from Global Banking & Finance Review
Finance

Dollar at week-high after US resumes attacks on Iran

Published by Global Banking & Finance Review

Posted on July 8, 2026

4 min read

· Last updated: July 8, 2026

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Dollar fades after touching one-week high as Iran deal in doubt

Market Reactions and Global Economic Developments

By Chuck Mikolajczak

Dollar Movement Amid Iran Tensions

NEW YORK, July 8 (Reuters) - The U.S. dollar dipped after reaching its highest level in about a week on Wednesday after U.S. President Donald Trump said an interim memorandum of understanding signed with Iran to end their conflict was "over", while investors digested the minutes from the Federal Reserve's recent meeting.

Trump said an interim agreement to end the war with Iran was "over" and that the United States was likely to launch new strikes on Wednesday night following Iranian attacks on U.S. bases in the Gulf.

However, Trump also said he did not expect a return to full-fledged war, and it was not immediately clear whether the negotiations on reaching a permanent deal would carry on.

Impact on Oil Prices and Treasury Yields

Oil prices jumped, with U.S. crude up 4.36% to $73.51 a barrel and Brent climbing to $78 per barrel, up 5.23% on the day. U.S. Treasury yields also climbed.

Dollar Index and Currency Movements

The dollar index, which measures the greenback against a basket of currencies, fell 0.2% to 100.98 after earlier climbing to 101.27, with the euro up 0.12% at $1.1425.

Expert Commentary on Dollar Strength

"The positioning is a little crowded on the long side, what that tells me is dollar strength is fully pricing in this idea that the Fed's going to get in here and raise rates and support rate differentials for the U.S. It's also largely priced in geopolitical risk," said Thomas Urano, co-chief investment officer at Sage Advisory in Austin, Texas, who also noted the greenback has seen strong gains from its late January low this year.

"It just leaves the dollar in a spot where it could be a little susceptible for corrections."

Federal Reserve Rate Hike Expectations

Expectations for a rate hike of at least 25 basis points from the Fed at its July meeting inched up to 30.5% from 26.7% in the prior session, while odds for the September meeting rose to 65.7% from 61.9%, according to CME FedWatch.

Global Central Bank Actions and Currency Responses

New Zealand Hikes Rate, Fed Minutes in Focus

NEW ZEALAND HIKES RATE, FED MINUTES IN FOCUS

Meanwhile, the New Zealand dollar strengthened 0.49% versus the greenback to $0.5705 although it was off its earlier highs, after the Reserve Bank of New Zealand hiked rates by 25 basis points to 2.5% to curb inflation pressures, as most economists had expected. It said that "Some further reduction in monetary stimulus is likely to be required" to control inflation.

Analyst Insights on New Zealand Policy

Analysts at Goldman Sachs said in a note that they see the start of a hiking cycle in New Zealand, "albeit a short one" as a positive for the currency "and part of the broader catch-up in macro conditions and monetary policy to many of its G10 peers."

Federal Reserve Meeting Minutes

Minutes from the Federal Reserve's June meeting, and first under new Chair Kevin Warsh, showed concern about high inflation mounted among policymakers, and a few participants at the June 16-17 meeting saw a case to raise rates right away.

"You kind of still have to lean a little bit to the risk that they have a chance for a rate hike later in the year," said Urano.

Other Major Currency Movements

Against the Japanese yen, the dollar strengthened 0.23% to 162.46 and was on track for a fourth straight daily advance as traders remained on guard for signs of a possible intervention from Japanese authorities.

Sterling strengthened 0.37% to $1.3401 after hitting a three-week high of $1.341.

(Reporting by Chuck Mikolajczak; additional reporting by Sophie Kiderlin in London and Gregor Stuart Hunter in Singapore; Editing by Philippa Fletcher, Kevin Liffey and Chizu Nomiyama )

Key Takeaways

  • U.S. strikes on Iran and sanctions against its oil exports lifted the dollar to around 101.18 on the dollar index, its strongest level since July 2 (investing.com)
  • Brent crude surged over 2–3%, driven by renewed Middle East tensions and disrupted shipping, exacerbating inflation and global yield concerns (investing.com)
  • Safe‑haven flows boosted the dollar across most currencies; gains were seen against the yen, euro, pound, while the kiwi awaited a potential RBNZ rate hike, and cryptos retreated slightly (marketscreener.com)

References

Frequently Asked Questions

Why did the US dollar reach its weekly high?
The US dollar surged as renewed US strikes on Iran increased geopolitical tensions and demand for safe haven currencies.
How did the Iran strikes affect oil prices?
Oil prices rose, with Brent crude up 2.6%, as geopolitical risks increased following US actions and attacks on tankers.
What currencies were impacted by the stronger US dollar?
The euro, British pound, and Australian dollar slipped or remained steady, while the dollar strengthened against the Japanese yen.
What was the impact on cryptocurrency prices?
Bitcoin fell by 0.2% and ether by 0.5% amid the heightened geopolitical tensions and dollar strength.
What did Westpac analysts say about the market outlook?
Westpac noted increased concerns over inflation and global yields jumping higher due to renewed geopolitical tensions.

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