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Stocks slide on flare-up of hostilities

Published by Global Banking & Finance Review

Posted on June 4, 2026

3 min read

· Last updated: June 4, 2026

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Hostilities Between US and Iran Cause Asian Stocks to Slide and Oil Prices to Rise

Market Reactions to Renewed US-Iran Tensions

By Gregor Stuart Hunter

Asian and Global Stock Market Movements

SINGAPORE, June 4 (Reuters) - Asian stocks fell at the start of trading on Thursday as renewed fighting between the U.S. and Iran rattled stocks, even as conflicting signs of de-escalation left investors hesitant.

MSCI's broadest index of Asia-Pacific shares outside Japan was down 0.8%, while S&P 500 e-mini futures slipped 0.4%. Korean shares reopened down 2% after a holiday, while Japan's Nikkei 225 slumped 1.3%.

Risk-Off Sentiment Returns

"Financial markets shifted back into a risk-off mode as the U.S. and Iran exchanged fire again," analysts from Westpac wrote in a research report.

Wall Street Performance and Oil Price Surge

Stocks on Wall Street tumbled overnight, with the S&P 500 falling 0.7% and oil prices rising around 2% as hostilities in the Middle East erupted anew and talks between Tehran and Washington showed little progress.

Economic Data and Oil Market Developments

US Economic Indicators

Traders looked through a better-than-expected U.S. ISM services sector PMI print, which rose in May as businesses preemptively placed orders and rebuilt inventories in anticipation of shortages and higher prices because of the war.

Middle East Ceasefire and Oil Prices

Brent crude futures were 0.7% lower at $97.12 a barrel as trading resumed on Thursday after Lebanon and Israel agreed to implement a ceasefire, which is contingent on a complete cessation of fire from the Iran-aligned Hezbollah militia and the evacuation of all its operatives from the South Litani Sector. The two sides had agreed last month to a ceasefire but hostilities had continued. 

Political Responses and Geopolitical Impact

US Legislative Action

The Republican-led U.S. House of Representatives approved a war powers resolution on Wednesday to block President Donald Trump from continuing the conflict against Iran. The measure is largely symbolic as it must still pass the Senate and would need a two-thirds majority in both chambers to override an almost certain presidential veto.

Ongoing Volatility from Geopolitical Uncertainty

"Geopolitics continue to drive volatility and as conflicting signals dampen hopes for a quick solution to the conflict," analysts from ING wrote in a research report.

Other Market Movers

Corporate Earnings and Technology Sector

Broadcom shares plunged more than 13% in extended trading after missing Wall Street expectations for second-quarter revenue on Wednesday, while its top executive left a previous 2027 sales forecast unchanged, in a rare sign that the AI chipmaker may be losing steam.

Currency and Bond Markets

Japanese Yen and Bank of Japan Policy

In the currency markets, the yen was down 0.1% at 159.945 yen per dollar after Bank of Japan Governor Kazuo Ueda said on Wednesday the central bank must discuss the pros and cons of raising interest rates if inflationary risks outweigh downside risks to the economy, in remarks that point to a strong chance of a rate hike this month.

US Dollar and Treasury Yields

The U.S. dollar index, which measures the greenback's strength against a basket of six currencies, held steady at 99.45 after a three-day rally which took the currency to its strongest level since April 7.

The yield on the U.S. 10-year Treasury bond was down 0.4 basis point at 4.485%.

Commodities and Cryptocurrencies

Gold rose 0.5% to $4,455.71, firmly within the trading channel it has sat in since the middle of last month.

Bitcoin fell 1.3% to $64,047.39, while ether rose 1.8% to $1,810.83.

(Reporting by Gregor Stuart HunterEditing by Shri Navaratnam)

Key Takeaways

  • Renewed fighting between the U.S. and Iran sent MSCI Asia‑Pacific ex‑Japan down ~0.8%, with South Korea off ~2% and Japan’s Nikkei down ~1.3% as markets turned cautious. (investing.com)
  • Oil prices eased (Brent around $97) after Lebanon and Israel agreed to a conditional cease‑fire involving Hezbollah’s withdrawal, providing a momentary reprieve. (axios.com)
  • U.S. politics added uncertainty: the House passed a war‑powers resolution to limit President Trump’s military actions against Iran—a largely symbolic move pending Senate approval, but fueling market caution. (apnews.com)

References

Frequently Asked Questions

Why did Asian stocks fall at the start of trading?
Asian stocks fell due to renewed fighting between the US and Iran, which caused market uncertainty and a risk-off sentiment among investors.
How did the US-Iran conflict impact oil prices?
Oil prices rose around 2% as hostilities between the US and Iran erupted, increasing supply concerns.
What was the performance of major Asian indexes?
The MSCI Asia-Pacific index fell 0.8%, Korea’s market reopened down 2%, and Japan’s Nikkei 225 dropped 1.3%.
How did currency and bond markets react to the situation?
The yen dropped 0.1% against the dollar, the US dollar index held steady, and the yield on the US 10-year Treasury bond fell slightly.
What happened to Broadcom shares after earnings?
Broadcom shares plunged more than 13% after missing Wall Street expectations for second-quarter revenue.

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