Oil slumps on hopes of a US-Iran deal; yen spikes after intervention, and US futures rise on talks optimism
Nick TwidaleDonald TrumpMasayuki NakajimaAstraZenecaMizuho BankATFX GlobalBristol Myers SquibbOPECOPEC+

Oil slumps on hopes of a US-Iran deal; yen spikes after intervention, and US futures rise on talks optimism

Oil prices fell over 6% amid hopes for a US-Iran deal, while the yen surged after a joint intervention by the US and Japan to stabilize the currency. US futures rose on optimism surrounding diplomatic talks, despite mixed performances in Asian markets.

reuters.com reuters.com+2 sources3 August 2026 · 04:06 UTC
CuriousCats Full Story

Oil prices fell sharply on Monday, with Brent crude futures dropping over 6% to $82.41, following President Trump's announcement of renewed talks with Iran aimed at reopening the Strait of Hormuz. This decision came after he called off a planned military strike, leading to a reassessment of risk premiums in the oil market.12

The yen surged more than 1% to 155.39 per U.S. dollar after a rare joint intervention by the U.S. and Japan, aimed at stabilizing the currency, which has been hitting 40-year lows. Japan's finance ministry confirmed the coordinated effort, stating they would not hesitate to take further action if necessary.

In the stock market, S&P 500 futures rose 0.4% and Nasdaq futures gained 0.6%, reflecting optimism over the diplomatic overtures. However, Asian markets showed mixed results, with Japan's Nikkei down 1% and South Korea's KOSPI sliding 3.6% after a turbulent month.

Analysts noted that while the intervention may provide temporary relief for the yen, structural factors remain unfavorable. Mizuho Bank strategist Masayuki Nakajima remarked, “It is difficult to argue that the secular depreciation trend in the yen has fundamentally changed.” Meanwhile, oil prices are also affected by OPEC+'s decision to increase output by 188,000 barrels per day from September, further easing supply concerns.78

Key Insight
“Trump canceled a planned strike on Iran after Saudi Arabia and other regional allies urged a deal, while OPEC+ approved a September output increase of about 188,000 barrels a day. The US-Japan yen intervention was the first joint currency action by the two governments since 2011.”
CuriousCats studied:
1
reuters.comreuters.com
“Oil prices skidded and stocks ​wobbled on Monday as hopes of peace in the Middle East grew, while the ‌yen jumped suddenly after the U.S. and Japan joint intervention to prop up the frail currency.”
reuters.com →
2
CNBCCNBC
“Trump canceled a planned attack on Iran, saying the "perimeters of a deal" had been agreed.”
CNBC →
3
bloomberg.combloomberg.com
“Oil fell and Treasuries rose after President Donald Trump said fresh US-Iran talks Monday, boosting optimism the two sides will reach a deal to reopen the Strait of Hormuz.”
bloomberg.com →
Ask CuriousCats
Who canceled the planned strike on Iran?
What was OPEC+'s output increase for September?
Why did the yen spike after intervention?
Are US futures rising due to oil price changes?
How does this currency intervention compare to past actions?
Get your CIA-level briefing,
in real time.
CuriousCats monitors the internet every minute for you and brings you the most personalized brief of videos, social media posts, news and more.
Download the App
One story brought you here.
CuriousCats brings you everything else worth knowing.
Get CuriousCats