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Yen firms after landmark intervention, dollar near lows on optimism over Iran talks - Finance news and analysis from Global Banking & Finance Review
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Yen firms after landmark intervention, dollar near lows on optimism over Iran talks

Published by Global Banking & Finance Review

Posted on August 5, 2026

4 min read

· Last updated: August 5, 2026

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Yen firms after landmark intervention, dollar near lows on optimism over Iran talks

Market Reactions and Currency Movements

By Amanda Cooper and Chibuike Oguh

NEW YORK/LONDON, Aug 5 (Reuters) - The Japanese yen steadied on Wednesday after a historic intervention, while the dollar hovered near six-week lows against major peers as renewed hopes for an end to the Iran war curbed safe-haven demand.

Yen Performance Following Intervention

The yen was slightly stronger on the day at 157.72 per dollar after falling 0.4% on Tuesday. It had strengthened on Monday to 155.2 per dollar after trading around 164, its weakest in 40 years, just a week earlier.

Support from U.S. Treasury and Central Banks

U.S. Treasury Secretary Scott Bessent said on Tuesday that the U.S. would do "whatever it takes" to support Japan's efforts to stabilize the yen, echoing former European Central Bank President Mario Draghi, who in 2012 pledged the same to preserve the euro during a regional debt crisis.

"I don't think the central banks are really defending a fixed level but the market is still going to challenge the central bank's resolve," said Marc Chandler, chief market strategist at Bannockburn Capital Markets.

"I think we're waiting for some fundamental justification to do so and we can get that in the next several days when we get the jobs data on Friday."

Upcoming U.S. Jobs Data and Fed Policy

As for macro events, the U.S. monthly employment report on Friday could help to shape expectations for near-term Fed policy. 

Intervention Fallout and Market Skepticism

INTERVENTION FALLOUT

The dollar hit its lowest against the Japanese currency in three months after joint purchases on Friday by Tokyo and Washington — the first yen-buying intervention by U.S. authorities since 1998 — and fell further on Monday.

Since then, it has strengthened against the yen, suggesting that investors are skeptical about how effective intervention can be in the longer run.

"The phrase 'sticking plaster' does feel relatively appropriate in many instances. The reality is, I think it is nothing more than a containment exercise, unless you get one of three criteria," CIBC Capital Markets head of G10 FX strategy Jeremy Stretch said.

Criteria for Effective Intervention

Those three, he said, would be a more aggressive approach to rate hikes from the Bank of Japan, markets pricing in a lower chance of rate increases from the Federal Reserve, and a lower oil price.

Bessent told public broadcaster NHK that he was sure Bank of Japan Governor Kazuo Ueda will "do what is best" for his country's economy, heightening market expectations that the BOJ could raise rates at its next policy meeting on September 17 and 18.

"We think the risk of further intervention remains elevated, but the bar for another move is probably higher unless we see a fresh bout of disorderly yen weakness," Joel Kruger, markets strategist at LMAX Group, said in a note. "Intervention can help slow the pace of depreciation, but history suggests it rarely changes the longer-term trend unless the underlying fundamentals shift."

Dollar Eases Amid Oil Price and Iran Optimism

DOLLAR EASES

The dollar index, which tracks the U.S. currency against six others, was 0.16% lower at 99.70 after hitting a six-week low on Monday. With the oil price back around $80 a barrel and U.S. President Donald Trump saying his administration had "very good discussions" with Iran, investors had less incentive to buy the dollar as a safe haven.

Impact of Oil Prices and Fed Rate Expectations

Lower oil prices also prompted traders to attach a lower chance of the Federal Reserve raising interest rates in September, which acted as a drag on the dollar. That probability was just below 60% on Wednesday, from closer to 70% at the start of the week.

Kansas City Fed President Jeff Schmid said on Tuesday that some monetary policy tightening was needed to bring "too high" inflation back to the Fed's 2% target.

Performance of Other Major Currencies

The euro rose 0.17% to $1.1552, while the pound edged up 0.09% to $1.3465.

(Reporting by Chibuike Oguh; Additional reporting by Jiaxing Li and Summer Zhen in Hong Kong; Editing by Barbara Lewis and Andrea Ricci)

Key Takeaways

  • Japanese yen modestly stronger after Tokyo‑Washington joint intervention and supportive rhetoric from Treasury Secretary Scott Bessent, reinforcing market belief in further coordinated action if needed
  • U.S. dollar remains near six‑week trough as oil prices drop on hopes of a diplomatic resolution in the Middle East, easing supply‑risk premium
  • Lower oil prices and subdued U.S. yields reduce odds of a September Fed tightening—markets now price ~60 % chance, down from ~75 % a week ago

Frequently Asked Questions

Why did the Japanese yen stabilize after falling to recent lows?
The yen found support due to recent intervention by Japanese and U.S. authorities, along with strong statements from U.S. Treasury officials backing Japan's currency stabilization efforts.
What is causing the U.S. dollar to linger near six-week lows?
Fresh optimism over the Middle East, especially hopes of diplomatic progress in the Iran conflict, has led to lower oil prices and reduced risk premiums, weakening the dollar.
How are expectations changing regarding a Bank of Japan rate hike?
Strong remarks urging higher Japanese interest rates have raised market expectations that the BOJ could increase rates at its next policy meeting in September.
How are easing oil prices affecting U.S. financial markets?
Falling oil prices prompted traders to reduce the likelihood of a Federal Reserve interest rate hike in September, influencing U.S. Treasury yields.
What is the impact of Middle East developments on global currency markets?
Positive diplomatic signals regarding the Iran conflict have eased fears of supply disruptions, strengthening the yen and weighing on the U.S. dollar and oil prices.

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