Trump threatens to bomb Oman over Iran cease‑fire, sparking market and shipping volatility

As the U.S.-Iran ceasefire nears expiration, President Trump warned he will bomb Oman if it interferes in talks. The threat has coincided with a plunge in Strait of Hormuz traffic and a rally in tech‑heavy Nasdaq stocks, highlighting heightened geopolitical risk across markets and shipping routes.

President Donald Trump said on August 17, 2026 that the United States would bomb Oman if the Gulf state "gets in the way," as the 60-day ceasefire with Iran expired with no deal and no formal negotiations under way . The remark, made in a Fox News interview, came in response to a question about Omani talks with Tehran over reopening the Strait of Hormuz while the US maintains its blockade of Iranian ports.

The waterway is effectively closed. Kpler tracking data showed only three vessels transiting Hormuz on Sunday, against roughly 130 per day before the war began on February 28 . Oman has been mediating with Iran to restore commercial transit, which is what places it in the path of the threat and puts the region's principal oil export route at the center of the dispute.

Markets priced the escalation directly. Brent crude reached about $90 a barrel and settled near $91, gold advanced, and US equities fell as the 30-year Treasury yield hit its highest level since 2007 on the view that sustained energy costs could force the Federal Reserve to tighten before year-end. That combination, higher crude alongside higher long-end yields, is the transmission channel that turns a Gulf security story into an equity-market story.

Iran has signalled it is prepared to intensify military activity in the Hormuz corridor if diplomacy fails, adding a second escalation path alongside the American one. With the ceasefire lapsed and no framework replacing it, the near-term range of outcomes has widened in both directions.

What to watch: daily Hormuz transit counts as the cleanest real-time read on whether the blockade is easing, the Brent term structure for evidence that traders expect a prolonged disruption, and whether Oman continues to mediate or steps back under US pressure.