Trump announced an extension of the ceasefire with Iran International oil prices surge and then fall, with Brent oil dropping below $100.

Against the background of fluctuating geopolitical situations and uncertain diplomatic progress, international oil prices have shown volatility. On Tuesday, the international benchmark oil price Brent crude fell below $100 per barrel, after briefly surpassing this level due to escalating tensions in the Middle East. US President Trump stated on social media that the US will extend the ceasefire arrangement with Iran until Iran and Pakistan present a "unified solution" and complete related negotiations. Although the specific extension period was not disclosed, this statement alleviated short-term concerns in the market about conflict escalation. As a result, oil prices surged and then fell back. Data shows that on Tuesday, the most active trading Brent crude futures rose by 3.1% to $98.48 per barrel, while US benchmark WTI crude futures rose by 2.6% to $89.67. Before Trump announced the ceasefire extension, Brent crude futures briefly rose above $100. However, market uncertainty remains high. The White House did not comment on plans for a US delegation to go to Islamabad, and it is widely believed that the related trip has been postponed. Meanwhile, the US continues to enforce a naval blockade on Iranian ports. Analysts at JPMorgan Chase pointed out that despite the blockade, some "shadow fleet" ships are still bypassing restrictions to continue transporting oil. Data from the shipping data company Lloyd's List Intelligence shows that since the blockade started on April 13, 26 relevant vessels have successfully evaded the blockade. Iran strongly opposes these measures. Iranian Foreign Minister Araghchi stated that the US naval blockade on Iranian ports "constitutes an act of war" and violates the ceasefire agreement. Trump has also accused Iran of "repeatedly violating the ceasefire agreement" and warned that if the prospects for negotiations are unclear, the US may take military action. He stated that if there is no progress in the agreement, "the use of force may be a more appropriate posture." Meanwhile, the US intercepted and boarded a tanker M/T Tifani carrying Iranian oil in the Indian Ocean, and detained an Iranian vessel M/V Touska heading to the port of Abbas in Iran. The US Central Command stated that since the naval blockade began, 28 vessels have been ordered to return to port.