US announces blockade on Iran by 2026?

Platform comparison

Market context

The United States has officially lifted its naval blockade on Iranian ports and the Strait of Hormuz following a signed interim deal with Iran, a move that directly contradicts the 32% crowd-implied probability of a new announcement before 2026. This cessation, confirmed by CENTCOM on 18 June, means American forces have ceased all enforcement actions and are no longer impeding vessel transit, though some ships remain nearby to monitor the agreement’s terms. The deal includes a 60-day toll-free transit window, Iran’s pledge to halt nuclear weapon pursuit, and a $300 billion reconstruction fund, fundamentally altering the baseline for any future blockade announcement.

Historically, US naval blockades have been temporary instruments tied to specific diplomatic or military escalations, rarely re-imposed once lifted without a fresh, severe provocation. Comparable cases, such as the 1980s Gulf of Oman tensions, show that blockades are typically suspended during negotiations and only reinstated if talks collapse or hostilities resume. Given the current 60-day negotiation window and Iran’s stated condition that talks require Israel to halt attacks on Lebanon, the probability of a new blockade announcement hinges on the failure of these talks or a sudden escalation in Lebanon, not on routine policy shifts.

Traders should watch for Iran’s Foreign Ministry statements on Lebanon, as Tehran has declared it will not negotiate until Israel stops its attacks, a dependency that could derail the 60-day window. Key catalysts include the scheduled technical talks in Doha, which Deputy Foreign Minister Gharibabadi confirmed are not set for this week, and any US response to Lebanon’s conflict. A recent Reuters report notes that the blockade’s removal was contingent on Iran resuming oil sales, meaning any reversal would require a breach of this interim agreement. Monitor CENTCOM updates and White House Situation Room briefings for signs of deal collapse, as these are the only credible triggers for a new blockade announcement.

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Methodology

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Resolution & payout

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FAQ

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How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.