A US-Iran Hormuz Deal Is Within Reach But Far From Settled

Diplomacy between Washington and Tehran over the Strait of Hormuz is alive — fragile, reversible, and nowhere near concluded. A formal agreement by December 31 stands at roughly one-in-three odds, a reading that has bounced from a peak near 70 percent some eleven weeks ago to a trough of 2 percent six weeks ago before clawing back to its current level. That whipsaw history, crossing conviction thresholds fifteen times in less than three months, is itself the most important fact: this is not a market drifting toward resolution but one reacting sharply to events that keep changing the calculation.

The military picture has stabilized in ways that matter. Both the US-Iran ceasefire and the Israel-Iran ceasefire are holding at near-certainty through their near-term windows, with each above 95 percent. That kind of stability on two fronts simultaneously is meaningful: it tells you the shooting has stopped and neither side is immediately itching to restart it. What the money has not concluded is that the pause translates into a durable political agreement. The odds of a final nuclear deal this year sit at just 14 percent, and the broader question of whether Iran's blockade ends by March 2027 has slipped several points in the past day, now sitting just above a coin flip at 57 percent. The ceasefire is real; the deal is not.

What distinguishes the short-term picture from the longer arc is the Strait of Hormuz itself. Despite the ceasefires, the odds that Hormuz shipping returns to normal by December 31 are a mere 12 percent — a deeply pessimistic read that implies the commercial disruption outlasts any near-term diplomatic progress. Longer-dated markets are modestly more hopeful: transit calls returning above the 60-call threshold before 2029 sits just above a coin flip at 56 percent. The money is not betting on a permanent closure of the strait, but it is betting that normalization takes years, not months.

The most plausible read of what is driving this pricing is that informed traders — likely including people with exposure to shipping, energy, and regional policy — believe the two governments have established a basic framework for de-escalation but cannot yet bridge the underlying political demands. Iran's leadership shows no strong probability of changing before mid-2027, sitting at 25 percent, and regime collapse before 2027 is effectively dismissed at 4 percent. That means Washington is negotiating with the same counterparty under the same domestic constraints, and the window for a deal that satisfies both sides' political bases remains genuinely narrow. A US invasion is not driving the calculus — that sits at 14 percent and has been drifting lower.

For global energy markets and the roughly 20 percent of seaborne oil that transits the strait in normal conditions, the implication is a prolonged period of elevated uncertainty. Shippers, insurers, and refiners pricing forward exposure should not expect a clean diplomatic resolution before the new year — the odds simply do not support it. The path that would confirm the market's current read is continued ceasefire stability paired with stalled negotiating rounds, with shipping restrictions remaining patchily in place. What would break it: a surprise nuclear framework announcement, which would almost certainly send the December-deal probability sharply higher in a market that has already shown it can move 66 points in under three months.