The International Atomic Energy Agency just got the green light to do what it does best: count centrifuges and verify promises. IAEA Director General Rafael Grossi announced on June 18 that the agency has begun technical work on nuclear verification following a peace deal framework between Iran and the United States.

The agreement, brokered in part by Oman, commits Iran to downblending its enriched uranium stockpiles under IAEA supervision. Those stockpiles were reported at over 400 kg enriched to 60% purity as of May 2025.

From non-compliance to negotiation table

This deal arrives barely a year after the IAEA found Iran non-compliant with its nuclear obligations for the first time in two decades. That finding, issued on June 12, 2025, marked a formal acknowledgment that years of incremental escalation had crossed a threshold the international community could no longer politely ignore.

Oman served as a key mediator, facilitating direct interactions between US and Iranian negotiators. The resulting framework goes beyond just nuclear issues. It encompasses the reopening of the Strait of Hormuz, a waterway through which roughly a fifth of the world’s oil supply passes, and outlines a phased sanctions relief process for Iran. The nuclear component, specifically the downblending of enriched uranium under IAEA cameras and inspectors, represents the most concrete and verifiable element of the broader package.

Not your father’s JCPOA

This is not a revival of the 2015 Joint Comprehensive Plan of Action, the landmark nuclear agreement that the US withdrew from in 2018. While the new framework references prior JCPOA structures, the current framework takes a more modular approach: secure the most urgent concessions now, particularly the downblending of that 60%-enriched stockpile, and leave deeper discussions about Iran’s broader nuclear activities for future rounds of talks.

The 400 kg of 60%-enriched uranium is particularly significant because material at that purity level sits uncomfortably close to weapons-grade. Enriching from 60% to the roughly 90% needed for a nuclear weapon is a relatively short technical step compared to reaching 60% from natural uranium levels.

What this means for markets and global risk appetite

The Strait of Hormuz commitment alone has significant implications for global energy markets. If phased sanctions relief materializes as outlined, it could eventually bring additional Iranian oil production back onto global markets. Iran has historically been one of OPEC’s larger producers, and even a partial return to pre-sanctions export levels would shift supply dynamics in a market that has been tightly balanced.

Investors should watch two things closely. First, whether the IAEA’s technical work proceeds on schedule and without obstruction from Iran, since any delays or access issues would signal the framework is shakier than advertised. Second, the timeline and conditionality of sanctions relief, because that’s where the real economic impact lives and where the deal is most likely to encounter political resistance in both Washington and Tehran.