Dollar Surges as US–Iran Peace Talks Fail

The US dollar strengthened sharply against major global currencies in thin late Sunday trading, as investors rushed toward safe-haven assets following the collapse of peace negotiations between United States and Iran.

The breakdown of marathon talks between Washington and Tehran has prolonged market uncertainty into a seventh consecutive week, reinforcing demand for the dollar as a relative safe haven amid escalating geopolitical risk.

Tensions intensified after Donald Trump announced that the US Navy would begin enforcing a blockade on the Strait of Hormuz a critical chokepoint through which roughly 20% of the world’s daily energy supply passes.

Iran had already effectively closed the strait following the outbreak of the war in late February, triggering a surge in oil prices exceeding 30% and fueling fears of a broad inflationary wave across global markets.

With the reopening of Asian markets, the dollar climbed against its major peers. The euro fell by 0.53% to $1.1663, while the US currency gained 0.1% against the Japanese yen, reaching 159.43.

Market analysts say the dollar’s appeal stems partly from the United States’ relatively limited exposure to imported energy inflation compared to other economies, making it a preferred refuge during periods of global instability.

Fiona Cincotta, senior market analyst at City Index, described the shift as a complete reversal of earlier optimism:

“Markets have gone back to a familiar equation, stronger dollar, rising oil, and broad-based selling across risk assets.”

Currencies tied closely to global growth and investor sentiment came under notable strain. The Australian dollar and British pound declined by 1.1% and 0.5%, respectively, reflecting a broader retreat from riskier assets.

Meanwhile, expectations of renewed inflationary pressure have prompted investors to reassess central bank policy paths. Institutions such as the European Central Bank and the Bank of England are now increasingly expected to consider interest rate hikes later this year, marking a sharp shift from earlier forecasts of steady or easing monetary policy.

Global equities, which had rallied on hopes of a diplomatic breakthrough earlier this month, have since retreated and now trade around 2% below pre-war levels.

Interestingly, gold, traditionally a key safe-haven asset, has lost around 10% of its value since late February. Investors appear to be favoring the US dollar as a more attractive hedge in the current environment, given its liquidity and resilience amid geopolitical shocks.

The collapse of US–Iran talks underscores the fragility of the geopolitical landscape and its direct impact on financial markets. With energy prices surging and inflation risks mounting, investors face a complex environment shaped by politics, supply disruptions, and shifting monetary expectations.