The United States and Iran have reached a preliminary agreement to reopen the Strait of Hormuz, a key global oil shipping route, leading to significant shifts in oil and gasoline prices. The deal, reportedly signed remotely on Wednesday by President Donald Trump and Iran’s President Masoud Pezeshkian, includes immediate waivers on U.S. Treasury sanctions that previously restricted Iranian oil exports. The agreement is set to be finalized during talks expected on Friday at an alpine resort in Switzerland, according to the Swiss foreign ministry.

Following the announcement, oil prices remained close to their lowest levels since the early days of the recent conflict involving Iran. Brent crude, the global benchmark, hovered near $80 a barrel, while West Texas Intermediate crude held steady. This reflects cautious optimism among traders that oil supplies may begin flowing again through the reopened strait, a vital artery for a significant portion of the world’s petroleum trade.

U.S. gasoline prices fell on Thursday to below $4 a gallon nationwide, marking the first time in months that prices have dropped beneath this threshold, according to the AAA motor club. Gasoline had surged to around $4.50 per gallon in May amid supply restrictions linked to the conflict and had remained about a third higher than before the outbreak of hostilities. Diesel prices also eased to $5.13 a gallon, still substantially above pre-war levels but down from recent highs. Prices vary regionally, with some areas in the Great Plains and South seeing greater relief, while the West Coast continues to face prices above $4 per gallon.

Market reactions to the deal were mixed. The S&P 500 closed about 1 percent higher in the United States, while Asian markets saw varying responses: Japanese and South Korean stocks rose roughly 2 percent, whereas Hong Kong shares declined over 2 percent. European indexes were similarly uneven, with Germany’s DAX up 0.4 percent, the Stoxx 600 falling 0.3 percent, and the UK’s FTSE dropping about 1 percent.

Analysts highlighted the potential for ongoing adjustments in global supply chains as oil shipping resumes through the Strait of Hormuz. Bob Savage, head of markets macro strategy at BNY, noted that while relief rallies may occur, increased costs related to tolls, insurance, and infrastructure could persist, influencing inflation and central bank vigilance. Meanwhile, some market participants remain cautious. Martha Tallas, senior manager at Argus Media, described a "wait-and-see" attitude among shippers, suggesting a slow ramp-up in trade activities despite the optimistic announcements.

The agreement marks an important step toward de-escalating tensions and stabilizing energy markets, though uncertainties remain over the exact timeline and scope of renewed oil exports. Prime Minister Shehbaz Sharif of Pakistan, a mediator in the deal, stated the memorandum would enter into force immediately, signaling swift implementation. The developments offer tentative relief for consumers facing high fuel costs but underscore the complexity of transitioning from conflict-driven shortages to normalized trade flows.