US-Iran talks teeter after Trump threats, crude surges 3%

A single day of US-Iran peace talks in Switzerland nearly collapsed after President Trump threatened to bomb the Islamic Republic, sending crude oil futures higher and exposing the fragility of a 60-day diplomatic framework.

US-Iran peace talks in Switzerland nearly collapsed Sunday after President Trump threatened to renew bombing of the Islamic Republic, pushing crude oil futures up more than 3% as traders priced in a renewed Strait of Hormuz closure.

"The risk premium on crude is repricing rapidly because the Strait of Hormuz is the single most consequential chokepoint in global energy markets," said Helima Croft, head of commodity strategy at RBC Capital Markets.

Iranian negotiators walked out after 80 minutes following Trump's social media post threatening to "hit Iran very hard again" and his reported warning that the US "may take over the Strait." Mediators Pakistan and Qatar salvaged the session, announcing lower-level technical talks would continue through the week and a "de-confliction cell" to address fighting in Lebanon. The Strait normally handles about 20 million barrels of oil daily, or roughly 21% of global consumption, according to the US Energy Information Administration.

The breakdown risks unraveling the memorandum of understanding signed last week, which had already sent oil futures down nearly 8%. If the Strait remains closed, analysts estimate crude could add $10 to $15 a barrel, threatening the summer driving season and complicating the Federal Reserve's inflation outlook.

Strait of Hormuz Becomes the Bargaining Chip

Iran's Revolutionary Guard Corps claimed Saturday it was shutting the waterway due to continued fighting in Lebanon, where the Iranian-backed militia Hezbollah has been trading fire with Israeli forces. The US Central Command disputed the closure, saying 67 ships transited Saturday and 55 on Friday, well below the pre-war average of more than 130 vessels daily.

Trump escalated further Sunday, telling Fox News the US "may take over the Strait, if we have to" and threatening to collect tolls from commercial vessels. The comments marked a sharp departure from the tone of last week's MOU signing, when Trump described Iran's new leadership as "far less radicalized."

Iran's lead negotiator, parliamentary speaker Mohammad Bagher Qalibaf, dismissed the threats as an act of "desperation" and warned that Iran's armed forces were "ready to respond in another way." Foreign Minister Abbas Araghchi credited Pakistani and Qatari mediators with delivering "major progress to end the Lebanon War" but said the first real test would be whether the de-confliction mechanism succeeds in halting the fighting.

Oil Markets Reprice the Risk Premium

The diplomatic turbulence comes at a vulnerable moment for oil markets. Before the MOU was signed, Brent crude had traded in a narrow range as traders weighed ample supply against weakening demand signals from China. The initial deal knocked nearly 8% off prices, but Trump's threats have erased much of that decline.

The last time the Strait of Hormuz faced a credible closure threat was in 2019, when Iran seized tankers after the US withdrew from the nuclear deal. Brent crude spiked about 15% over six weeks before diplomatic channels reopened. The current situation carries additional complexity because the fighting in Lebanon gives Iran a direct lever to escalate without formally abrogating the nuclear talks.

The broader market impact has been swift. The CBOE Volatility Index rose above 22 as investors rotated out of equities and into gold, which gained 1.2% on the session. Energy sector stocks rallied on the crude spike, while airline and shipping shares declined on fuel cost concerns.

Vice President JD Vance, who led the US delegation alongside special envoy Steve Witkoff and Jared Kushner, had opened the talks by asking whether the two sides could "turn over a new leaf" and "change relations in the Middle East permanently." By Sunday evening, the question had shifted to whether the 60-day framework could survive its first weekend.

This article is for informational purposes only and does not constitute investment advice.