Dollar Strengthens as Peace Accord Faces Doubts, Pound Falls on UK Political Jitters

US, June 22 : The U.S. dollar remained resilient in global currency markets on Monday as investors grappled with renewed uncertainty surrounding a fragile peace arrangement between the United States and Iran. Concerns intensified after U.S. President Donald Trump warned that military action could resume if the agreement collapsed, while Tehran announced the closure of the strategically vital Strait of Hormuz.

Although diplomatic negotiations continued for a second day in Switzerland, market participants remained cautious about the durability of the ceasefire framework reached last week. The memorandum of understanding, which extended an earlier truce by 60 days, was initially welcomed by investors. However, recent developments have raised questions about whether both sides can maintain commitments under the agreement.

The Strait of Hormuz, one of the world’s most important energy transit routes, quickly became the center of market attention. Shipping data indicated a sharp decline in vessel traffic through the narrow waterway after Iran’s announcement, triggering concerns over global crude supplies.

As a result, oil prices moved higher, with Brent crude futures climbing more than one percent to trade above $81 per barrel. Traders viewed the disruption as a potential threat to energy flows from the Gulf region, prompting renewed demand for safe-haven assets and supporting the U.S. currency.

Market analysts noted that investors are increasingly focused on the practical impact of geopolitical developments rather than diplomatic rhetoric. The uninterrupted movement of oil cargoes through the Strait of Hormuz remains a critical factor for global markets, influencing currency, commodity, and bond trading decisions.

The strengthening of crude prices also reinforced inflation concerns, adding another layer of complexity for central banks already navigating uncertain economic conditions. Higher energy costs could contribute to broader price pressures across major economies if disruptions persist.

While geopolitical tensions dominated market sentiment, political uncertainty in Britain also attracted attention. The British pound weakened after reports suggested Prime Minister Keir Starmer was reassessing his political future following a significant electoral victory by political rival Andy Burnham.

Sterling slipped against the dollar as investors evaluated the potential implications for the United Kingdom’s fiscal and economic policies. Analysts warned that any shift toward looser spending rules could unsettle bond investors and increase pressure on the currency.

The euro also edged lower against the greenback, reflecting broader demand for the dollar amid heightened risk aversion. Commodity-linked currencies experienced modest declines, with both the Australian and New Zealand dollars trading weaker during the session.

Attention in the foreign exchange market also remained fixed on Japan, where the yen continued to hover near multi-year lows. The Japanese currency weakened further against the dollar, approaching levels that previously prompted intervention by authorities.

Japanese Finance Minister Satsuki Katayama reiterated that officials remain prepared to act if excessive volatility threatens market stability. Nevertheless, traders appear unconvinced that intervention alone can reverse the yen’s downward trajectory while U.S. interest rates remain elevated.

The divergence between monetary policies in Washington and Tokyo has become a major driver of exchange-rate movements. Expectations that the Federal Reserve could maintain a restrictive stance for longer have encouraged investors to favor dollar-denominated assets.

U.S. Treasury yields also moved higher, reflecting changing expectations regarding interest rates. The yield on two-year government bonds climbed to its highest level since early 2025 as traders increased bets that the Federal Reserve may deliver additional rate hikes before year-end.

Financial markets are now pricing in a stronger possibility of tighter monetary policy, with investors anticipating at least one quarter-point increase in borrowing costs by September. Elevated yields have further enhanced the appeal of the dollar, particularly against lower-yielding currencies.

With geopolitical risks in the Middle East, political developments in Britain, and shifting monetary policy expectations all converging, investors are preparing for continued volatility across currency and commodity markets.

For now, the dollar’s strength reflects a combination of safe-haven demand, higher Treasury yields, and persistent uncertainty over global energy supplies. Market participants will closely monitor developments in Switzerland and the Strait of Hormuz in the coming days, as any further escalation could have significant implications for global trade, inflation, and financial stability.