European markets opened in the red on Tuesday as traders absorbed media reports suggesting an impasse in talks between the United States and Iran and digested a further rise in oil prices.
By 03:06 ET (07:06 GMT) the pan-European Stoxx 600 was down 0.3%. Germany's Dax slipped 0.2%, France's CAC 40 fell 0.3% and the U.K.'s FTSE 100 eased 0.1%.
Press accounts indicated that President Donald Trump was unhappy with an Iranian proposal that would bring an end to the conflict and reopen the Strait of Hormuz, while deferring discussions about Tehran's nuclear program to a later date. Reuters, citing a U.S. official briefed on the matter, reported that Mr. Trump has frequently cited the elimination of Iran's nuclear capabilities - particularly any path to a nuclear weapon - as a principal motive behind the joint U.S.-Israeli military action launched in late February, and that he was displeased by the terms of the proposal.
Momentum toward renewed diplomacy was also set back over the weekend when Mr. Trump canceled plans to send U.S. negotiators to Pakistan for a fresh round of discussions. Iran's foreign minister made two brief visits to the Pakistani capital last weekend, and then met with Russian President Vladimir Putin on Monday, where he reportedly received support.
Meanwhile, the Strait of Hormuz - a narrow, strategically vital waterway off Iran's southern coast through which roughly one-fifth of the world's oil normally transits - has been all but closed to shipping for weeks. That effective disruption has contributed to a marked increase in crude prices, pushing them well above pre-conflict levels, and prompted concern that an energy shock could intensify global inflationary pressures and prompt central banks to consider further rate action.
Brent crude futures climbed again on Tuesday, reflecting continued risk premium tied to the shipping bottleneck around the Gulf.
At the company level, shares of BP rose after the British energy company reported first-quarter profits that more than doubled year-on-year, a result driven in part by elevated oil and gas prices. Norwegian Air Shuttle also saw its stock move higher after reporting a smaller-than-expected operating loss, with the carrier pointing to steps taken to hedge against rising jet fuel costs as a supporting factor.
By contrast, shares of Novartis retreated after the Swiss drugmaker reported first-quarter core operating profit that fell short of market expectations.
The combination of geopolitical uncertainty, tightness in crude supply lines and mixed corporate results set the tone for the European open, with sectors tied to energy and transport particularly sensitive to developments in the Gulf.
Market context
Investors were weighing the immediate economic implications of a disrupted shipping chokepoint and the prospect that higher energy prices could feed through into broader inflation, an outcome that could influence monetary policy decisions. Corporate earnings in energy, airlines and pharmaceuticals added another layer of influence on individual stock moves.