The Blockade Ends Before 2027 — But Don't Expect the Strait to Open Anytime Soon

The Iranian blockade of the Strait of Hormuz is likely to end — on paper — before 2027. At 69%, the odds favor a formal US announcement declaring the blockade over by December 31, 2026. That is a meaningful lean: not a certainty, but a clear majority conviction. The diplomatic machinery is moving, ceasefire conditions are holding, and the political incentives on both sides point toward some kind of declared resolution before the calendar turns. The question is not whether an announcement comes, but what it will actually mean for the world's most critical oil chokepoint.

The 69% figure on the blockade-end contract has slipped 5.2 percentage points in the past 24 hours — a modest softening that suggests the timeline, while still favored, is not locked in. Meanwhile, the near-term outcome contracts have collapsed far more sharply: the September 30 resolution contract lost 14 percentage points in a single day, and October 31 sits at just 47%. The market is pushing the resolution date toward year-end rather than summer or fall. A diplomatic meeting between Washington and Tehran by March 2027 is priced at 62%, consistent with a deal that takes time to formalize. What is striking, however, is that Strait of Hormuz traffic returning to normal by September 30 sits at just 4%, and even by December 31 only reaches 32%. An announcement ending the blockade and actual resumed shipping traffic are, the market is saying, very different things.

That gap is the real story. The most plausible reading is that any near-term resolution will be a political declaration — a ceasefire formalized, a framework announced — rather than a full normalization of commerce. Iran retains leverage so long as the Strait remains functionally constrained, and that leverage does not evaporate the moment a press release is issued in Washington. The 81% probability that Mojtaba Khamenei leads Iran through the end of 2026 reinforces continuity of Iranian strategic intent. A final nuclear deal by December 31 is priced at just 10%, which means whatever agreement lifts the blockade will almost certainly be partial — enough to claim a win, not enough to resolve the underlying conflict. The people staking real money on this appear to believe the US will declare victory while the underlying dispute remains very much alive.

What breaks this argument is the scenario where the ceasefire collapses entirely before any announcement can be made. The US invasion of Iran contract sits at 14% — low but not trivial — and a military escalation would obviously preclude any orderly blockade-end declaration. A domestic political shock in Tehran, a miscalculation at sea, or a breakdown in the Oman-mediated channel (the Iran-Oman Hormuz Agreement by September 30 has already fallen to 45%) could push the resolution date past December 31 entirely, making the 31% NO probability the one that cashes. The ceasefire holding through August 25 is virtually certain at 100%, but that tells us only about the next few days, not the months of negotiation ahead.

This argument is the market's, decoded — not investment advice.