Why Markets Surged on the US-Iran Peace Deal

The Immediate Market Reaction

The scale of Monday’s moves reflected how severely the war had distorted prices across asset classes. The Strait of Hormuz, through which roughly one-fifth of global petroleum consumption flows, had been choked off by a US naval blockade and the broader conflict since February 2026 . The prospect of its rapid reopening rewired assumptions overnight.

• Asian equities surge. Japan’s Nikkei 225 Index jumped nearly 5% to above 69,000, setting a new all-time record high . South Korea’s Kospi gained approximately 5.2%, and India’s GIFT Nifty futures pointed to a gap-up open for the Nifty50 index . Australia’s ASX 200 and other regional benchmarks also rallied sharply .
• US futures follow. S&P 500 futures rose roughly 0.8% in after-hours trading to push above 7,480, while Nasdaq 100 futures climbed around 1.2% .
• Oil prices tumble to three-month lows. Brent crude, the international benchmark, fell approximately 4% to below $84 per barrel, marking the lowest level since March 10. West Texas Intermediate (WTI) dropped more than 4% toward $80 per barrel . The expectation that the Strait of Hormuz would reopen within days removed the largest supply disruption premium from the market.
• Gold rallies on dollar weakness. Gold gapped higher, trading above $4,200 and briefly touching $4,300, as lower oil prices moderated inflation expectations and the US dollar weakened broadly .
• Dollar weakens broadly. The US dollar declined as risk appetite returned, with commodity and risk currencies rallying while the Japanese yen notably underperformed in the risk-on environment .

The Islamabad Memorandum: What the Deal Actually Says

The framework is formally known as the Islamabad Memorandum (or Islamabad Declaration), in recognition of Pakistan’s central role as the primary mediator. Qatar, Egypt, and Turkey were also involved in the negotiations . It is not a final peace treaty; it is an interim memorandum of understanding (MoU) that buys time for broader talks.

Key provisions of the agreement, as publicly described by Pakistani Prime Minister Shehbaz Sharif and confirmed by US and Iranian officials, include:

• Immediate and permanent ceasefire on all fronts. This explicitly covers military operations in Lebanon .
• Reopening of the Strait of Hormuz immediately after the formal signing ceremony, toll-free, with shipping volumes expected to return to pre-war levels .
• Lifting of the US naval blockade on Iranian ports, coupled with a pathway toward easing US oil sanctions . President Trump’s public statement on social media summarized the administration’s posture succinctly: “Let the oil flow.”
• Deferred nuclear negotiations. The deal leaves the fate of Iran’s nuclear program to 60-day follow-on talks. As an interim step, Iran would retain its existing stockpile of approximately 440 kg of enriched uranium during that negotiation window .
• Formal signing ceremony scheduled for June 19, 2026, in Switzerland .

The document is reportedly a 14-point framework. Its structure as a preliminary MoU, rather than a ratified treaty, means that the most consequential questions—uranium enrichment levels, sanctions relief mechanics, and the final disposition of enriched material—remain unresolved .

The Risks That Could Derail It

Monday’s rally priced in a smooth path to peace, but the diplomatic situation is precarious. Several immediate threats hang over the agreement.

• The Israeli airstrike on Beirut (June 14). Hours before the deal was finalized, Israel bombed the Dahiyeh district of Beirut’s southern suburbs, targeting what it described as a Hezbollah command center. At least one person was killed, and several were wounded . Hezbollah is backed by Iran, and the ceasefire terms are supposed to cover Lebanon.
• Israel rejects the accord. Israeli National Security Minister Itamar Ben Gvir stated plainly that “Trump’s accord does not obligate us… we are not a party to this agreement,” and Israel’s defense minister said the country would not withdraw from seized territories in Lebanon, Syria, or Gaza . Because Israel is not a signatory, the ceasefire in Lebanon depends entirely on whether Hezbollah and Israeli forces choose to respect a deal they did not sign.
• Trump condemned the airstrike. The US president publicly called the Israeli attack an event that “should not have happened, particularly on a special day when we are so close” to a deal, but he still insisted the Iran agreement was on track .
• The nuclear can has been kicked down the road. A 60-day negotiation window is a fragile vessel for resolving the most contentious issue in US-Iran relations. If follow-on talks collapse, the entire framework could unravel, and the geopolitical risk premium now evaporating from oil and equities could return abruptly .

Bottom Line

Markets are celebrating the removal of the single largest supply disruption to global energy since the war began. If the Strait of Hormuz reopens as promised, oil prices could fall further, inflation pressures would ease, and central banks would gain room to maneuver. But the foundation is an interim memorandum—not a comprehensive treaty—and two of the most critical questions, Iran’s nuclear program and the role of non-signatory Israel, are unresolved. The rally is real, but so is the fragility beneath it.