Global Stocks Rally, Oil Prices Fall After US and Iran Reach Tentative Deal

Global stock markets surged and oil prices tumbled on June 15, 2026, after the United States and Iran reached a tentative deal to end their three-and-a-half-month war. The S&P 500 climbed 1.5%, the Dow Jones rose 638 points, and the Nasdaq jumped 2.3%, according to AP. Brent crude oil dropped nearly 5% to $83.18 per barrel as traders bet on the reopening of the Strait of Hormuz.
Pakistan's Prime Minister Shehbaz Sharif confirmed that both sides agreed on the text of a peace memorandum on June 14. A formal signing is set for June 19 in Switzerland, Al Jazeera reported. UN Secretary-General António Guterres called it a "critical step" toward lasting peace.
The conflict started on February 28, 2026, when U.S. and Israeli forces struck targets inside Iran. Tehran responded by mining the Strait of Hormuz and blocking all ship traffic through the waterway, according to ITV News. The Strait is the world's most important oil route. Its closure sent global inflation soaring and forced central banks to raise interest rates.
A ceasefire came on April 8, but fighting flared again on June 7 after fresh Israeli strikes in Lebanon triggered a massive Iranian missile response. By June 11, President Trump pulled back from new U.S. strikes and began pushing for a diplomatic deal, CNA reported. The economic pain — felt by consumers worldwide through higher fuel and food costs — had become too great to ignore.
President Trump announced the deal on social media, saying "ships are starting to move." He confirmed the end of the U.S. naval blockade of Iranian ports. Trump added, "I never cared about regime change," signaling a shift toward trade over confrontation, according to The Guardian.
Iran's Foreign Minister Abbas Araghchi confirmed the agreement but stressed that implementation waits for a formal signing. Despite the optimism, shippers and insurers remain cautious. The Guardian noted that the "arrangement to cross the waterway remains unclear" and that the risk of remaining mines is still too high for ships to move at full speed right away.
U.S. benchmark crude oil fell $4.55 to $80.33 per barrel, while Brent dropped to $83.18, according to Investment Executive. Lower oil prices should ease costs for households and businesses on fuel, food, and fertilizer. Analysts at ANZ noted that markets had already moved on rumors last week, then surged again on official confirmation.
Still, analyst Stephen Innes of SPI Asset Management offered a warning. He described the Strait reopening as a "relief valve, not a full peace dividend." Energy experts say it could take months before shipping companies and insurers feel safe enough to resume normal operations through the waterway, Investment Executive reported.
Israel is the biggest wild card. Prime Minister Benjamin Netanyahu has stated that a U.S.-Iran deal does not bind Israel to stop fighting Iranian-backed groups in Lebanon, according to ITV News. Israel says it will keep running operations against Hezbollah regardless of what Washington and Tehran agree to.
Inside Iran, hardliners are furious. IRGC-affiliated media showed protesters chanting "Death to Araghchi," calling him a "dishonorable compromiser," Iran International reported. On the nuclear front, a 60-day window opens for broader talks — but Iran already holds 440.9 kilograms of uranium enriched to 60%, just a short technical step from weapons-grade material, according to AP.
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