Dollar Surges as Failed U.S.-Iran Talks Rekindle Safe-Haven Rush, Inflation Fears Intensify

The U.S. dollar climbed sharply against major currencies in thin late-Sunday trading after the collapse of marathon peace talks between Washington and Tehran reignited investor anxiety, sending capital rushing back into the relative safety of the greenback and deepening concerns over a renewed inflation shock.

“Effective immediately, the United States Navy, the Finest in the World, will begin the process of BLOCKADING any and all Ships trying to enter, or leave, the Strait of Hormuz,” he said in a post on Truth Social on Sunday.

The move followed the failure of high-stakes negotiations in Islamabad aimed at preserving a fragile two-week ceasefire and reopening the Strait of Hormuz, the strategic waterway that handles roughly 20% of the world’s daily oil supplies. Within hours of the talks breaking down, President Donald Trump announced that the U.S. Navy would begin blockading the strait, sharply escalating tensions in an already fragile global market environment.

With the conflict now entering a seventh week of uncertainty, investors rapidly unwound positions built on hopes of a diplomatic breakthrough. The dollar, which has regained its appeal as the market’s preferred haven asset, rose broadly as Asian markets opened, pushing the euro down 0.53% to $1.1663 while gaining 0.1% against the Japanese yen to trade at 159.43.

The renewed bid for the dollar underscores a broader reassessment of geopolitical risk. Unlike Europe and parts of Asia, the United States is viewed as less directly exposed to imported energy-price inflation, making the dollar a more attractive refuge at a time when crude prices have already surged more than 30% since the war began in late February.

That oil shock is now emerging as the central driver of market sentiment. With supply through Hormuz effectively constrained and the U.S. now moving to impose a naval blockade, traders are bracing for further upward pressure on energy costs, freight insurance, and headline inflation across major economies.

“This is an absolute unwinding of any optimism heading into the peace talks into that play of dollar: safe-haven; oil jumping and selling out of everything else,” City Index senior market analyst Fiona Cincotta said.

Her assessment captures the speed with which market psychology has shifted. Only days earlier, the April 7 ceasefire announcement had prompted investors to rotate back into risk assets, with equities rebounding and oil easing on expectations that a broader settlement was within reach. That optimism has now evaporated.

“On the other hand, we have seen the markets over-exaggerate sometimes. And I think especially around this scenario, the market is struggling to really price it correctly, because there is so much uncertainty, so many unknowns.”

The sense of uncertainty was visible across currency markets, where more risk-sensitive units came under pronounced pressure. The Australian dollar fell 1.1%, while sterling dropped 0.5%, reflecting growing fears that a prolonged conflict could weigh on global growth even as it fuels inflationary pressures.

This dual threat, slower growth coupled with higher prices, is forcing a rapid repricing of interest-rate expectations. Before the war, markets had largely anticipated that central banks such as the European Central Bank and the Bank of England would keep borrowing costs unchanged or potentially move toward rate cuts later in the year. That view is now being challenged by the prospect of energy-driven inflation forcing policymakers back into a tightening stance.

The implications extend beyond currencies. Global equities, which ended last week near their highest levels since early March on hopes that Washington and Tehran were edging toward a settlement, remain about 2% below pre-war levels, suggesting investors are still reluctant to fully embrace risk.

Another notable feature of the current market reaction is the underperformance of gold. Traditionally viewed as the ultimate safe-haven asset, bullion has fallen about 10% since late February, indicating that investors currently see the dollar, rather than precious metals, as the more liquid and reliable shelter amid the geopolitical turmoil.

The broader market narrative has now shifted decisively from ceasefire optimism to conflict-risk pricing. For investors, the focus in the days ahead will center on whether the Hormuz blockade triggers a further spike in oil, and whether central banks begin signaling a tougher stance in response to renewed inflation risks.