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Dollar holds firm as risk of protracted Middle East war saps sentiment

Published by Global Banking & Finance Review

Posted on March 30, 2026

3 min read

· Last updated: April 1, 2026

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Dollar holds firm as risk of protracted Middle East war saps sentiment
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By Ankur Banerjee SINGAPORE, March 30 (Reuters) - The U.S. dollar held broadly steady on Monday, poised for its strongest monthly gain since July as investors fret about the ramification of a long war

Euro dips as Iran conflict stirs growth fears

Market Reactions to Geopolitical Tensions

By Karen Brettell

Euro and Sterling Under Pressure

NEW YORK, March 30 (Reuters) - The euro fell against the dollar on Monday on concerns about the growth impact from an extended U.S.-Israeli war with Iran, while the yen was supported after Japanese officials stepped up currency intervention threats.

President Donald Trump said on Monday that Iran's energy plants and oil wells would be obliterated if it did not open the Strait of Hormuz, after Tehran described U.S. peace proposals as "unrealistic" and fired waves of missiles at Israel.

Impact of Rising Oil Prices

Rising oil prices have raised concerns about higher inflation. But the longer the war drags on, the more damage higher energy costs will have on consumer finances and economic growth.

Investor Sentiment Shifts

“Investors are starting to think about the growth side of the equation,” said Noel Dixon, global macro strategist at State Street Global Markets.

“There's starting to be a focus on some of the more vulnerable countries, largely the UK, the EU,” Dixon said. “The sentiment is starting to shift a little bit there in terms of the forward rate expectations.”

The euro fell 0.44% to $1.1457 while sterling dropped 0.57% to $1.3181, and earlier reached $1.3170, the lowest level since November 26.

The dollar index, which measures the greenback against a basket of currencies including the yen and the euro,rose 0.22% to 100.53 and reached 100.61, the highest since May 19.

The dollar has benefited from a safe-haven bid from the war, while the United States is also in a comparatively better position than many peers as a net energy exporter.

Central Bank Responses

Federal Reserve's Stance

Federal Reserve Chair Jerome Powell on Monday said the U.S. central bank can wait to see how the Iran war affects the U.S. economy and inflation, noting that policymakers typically look through shocks such as those from higher oil prices.

Fed funds futures traders have priced out the two rate cuts for this year that were expected before the Iran war began, and now see no rate moves by year-end.

Japanese Yen and Policy Actions

The Japanese yen strengthened 0.42% against the greenback to 159.63 per dollar, after earlier moving past the psychologically important 160-per-dollar level, which was its weakest since July 2024 when Japan last intervened to shore up the currency.

Intervention Threats and Economic Impact

In the strongest warning yet of a yen-buying intervention, Japan's top currency diplomat Atsushi Mimura said on Monday authorities may need to take "decisive" steps if speculative moves persist in the currency market.

Separately, Bank of Japan Governor Kazuo Ueda said the central bank would closely watch yen moves as they affect the economy and prices, suggesting inflationary pressures from a weak currency could justify raising interest rates in the coming months.

Other Currency and Crypto Moves

Elsewhere, the Australian dollar fell to a two-month low of $0.6831 and the kiwi dropped to a four-month low of $0.5698.

In cryptocurrencies, bitcoin fell 0.34% to $66,332.38.

(Additional reporting by Stefano Rebaudo; Editing by Joe Bavier and Will Dunham)

Key Takeaways

  • The Iran war’s effective blockade of the Strait of Hormuz (accounting for ~20% of global oil flows) has triggered the largest energy supply shock in history, sharply raising oil prices and fueling safe‑haven demand for the dollar.
  • The yen weakened beyond 160 per dollar—its worst level since July 2024—prompting Tokyo’s warning of possible intervention; other commodity-linked currencies such as the Australian and New Zealand dollars also tumbled.
  • Geopolitical tensions and supply disruptions have sparked market volatility, elevated inflation risks globally, and driven central banks and investors into defensive stances—benefiting the dollar as a haven asset.

References

Frequently Asked Questions

Why is the U.S. dollar strengthening amid the Middle East war?
Investors are seeking safety due to the prolonged conflict, boosting demand for the U.S. dollar as a safe haven.
How has the Middle East conflict affected oil prices?
The conflict shut the Strait of Hormuz, driving Brent crude toward its largest monthly rise and affecting global rate expectations.
What actions are Japanese authorities considering for the weak yen?
Japanese authorities are prepared for decisive intervention if speculative moves persist in the currency markets.
How have other major currencies performed in March?
The euro and sterling both declined, while the Australian and New Zealand dollars saw their steepest drops in several months.
What is the outlook for the yen according to analysts?
Analysts at Commonwealth Bank of Australia believe recent yen weakness is driven by fundamentals, but intervention could rapidly reverse it.

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