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Home/Geopolitics/US announces end of Iranian blockade by September 21, 2026?
PolymarketGeopoliticsUpdated 14m ago

US announces end of Iranian blockade by September 21, 2026?

Market probability
29.5%
Little changed over 24 hours
26 days until the event deadline
Deadline: September 21, 2026 at 11:59 PM ET

No meaningful repricing — the probability is steady.

The pricing is supported by healthy trading volume and market depth, a tight spread.

How credible was the move?

Three separate questions — a move can be genuine while the latest price is still settling. Methodology →

Move validity

Is the move backed by real trading and depth?

Strong

The pricing is supported by healthy trading volume and market depth, a tight spread.

Consensus stability

Has the market settled at the new probability?

Stable

The probability has held near its current level over the past several hours.

Contract clarity

Will the rules resolve without ambiguity?

High

The resolution rules are relatively specific, with a named source and a defined deadline.

Recent trade activity$10.8K traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

What this market actually measures

On July 13, 2026, Trump announced the United States would reinstate its naval blockade of Iran, targeting Iranian ships and customers. This market will resolve to “Yes” if the United States government, or an authorized representative of the United States government, publicly and officially announces the end, termination, lifting, or suspension of the United States’ naval blockade on Iranian ships and ships of Iranian…

This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.

View full official resolution rules

On July 13, 2026, Trump announced the United States would reinstate its naval blockade of Iran, targeting Iranian ships and customers. This market will resolve to “Yes” if the United States government, or an authorized representative of the United States government, publicly and officially announces the end, termination, lifting, or suspension of the United States’ naval blockade on Iranian ships and ships of Iranian customers, between market creation and the specified date, 11:59 PM ET. Otherwise, this market will resolve to “No”. An announcement qualifies if it communicates that the United States will generally cease blocking vessel traffic for Iranian ships and customers, including an announcement that the blockade will not take effect at all, even if some restrictions remain (for example, an imposition of fees). An announcement does not qualify if it reflects only a limited or partial change that stops short of a general end or suspension of the blockade, for example, an exemption for a specific vessel, cargo, or port. A qualifying announcement must be a declarative statement of the United States government’s present termination or suspension of the blockade, previously-unannounced prior termination or suspension of the blockade, or definitive decision to terminate or suspend the blockade. A qualifying announcement must clearly and unambiguously identify the end or suspension of the blockade. Statements that merely allude to, reference, or describe an end to the blockade, without clearly communicating it, do not qualify. The announcement need not use specific terminology or reference the end of a blockade by name; an announcement of a resumption of prior obligations, the maintenance of a status quo, or a return to a previously agreed baseline qualifies, provided the substantive policy of ending or suspending the blockade is clearly and unambiguously communicated. A qualifying announcement must be made through official channels, by an individual acting in an official capacity. Statements made incidentally or informally in a context not intended for official communication do not qualify. The following do not qualify: Anonymous, unattributed, or leaked statements not confirmed as official; Statements by persons not authorized to speak for the United States government; Third-party speculation, analysis, or predictions that the United States government will announce or implement an end to the blockade; Satirical, fabricated, hacked, or impersonated communications; and Statements that describe a prospective, contingent, probable, or conditional end to the blockade rather than announcing a present and decided position. Once a qualifying announcement is made, this market will resolve to “Yes” regardless of whether it is later reversed, or whether the blockade actually ends in practice. Resolution will be based on official information from the United States government, including the President, the Department of Defense, the Department of State, and United States Central Command (CENTCOM), or the official representatives of the United States government.

What could move this market next?

  • The market's deadline arrivesSeptember 21, 2026 at 11:59 PM ET

    The contract must resolve based on what has happened by this date.

Derived from the contract's own mechanics as of Aug 26, 4:06 AM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Probability by deadline

The same event, priced across deadline contracts on this venue.

  • By Aug 317.3%
  • By Sep 716.5%
  • By Sep 1423.5%
  • By Sep 21 (this market)29.5%
Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: high · expected error ±10 pts.

Trading normallyLegacy movement classifier: watch

What's happening

medium classifier confidence
Trading normally

Liquid, two-sided, and calm. The current price reads as settled consensus — the latest print is a reasonable summary of what the market believes.

Change (pts)1H0.06H0.024H0.07D0.0
Score breakdown — Movement, Liquidity & Trust

ProbCast Trust Score

74/ 100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

ProbCast measures how reliable this market probability appears — not what to trade.

Movement0

Magnitude of recent probability change

Liquidity74

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ProbCast — Odds Reliability

Know whether prediction-market odds can be trusted. ProbCast analyzes liquidity, market activity, spreads, and price movement to help distinguish meaningful repricing from thin-market noise.

Questions? Chat with us on Telegram
TodayTop MoversEventsAll MarketsWhat ChangedVenue DivergencePolymarket vs KalshiMethodologyCoverageMeta's ArenaWatchlistTerms of UsePrivacyCrypto
By Sep 30
40.5%
  • By Oct 3159.5%
  • By Dec 3176.5%
  • Extending the deadline from Oct 31 to Dec 31 adds about 17.0 percentage points of implied probability.

    • Liquid, two-sided, and calm — price behaving as settled consensus

    The latest price is a usable but caveated read — weigh it with the market state.

    More details — reliability score, dynamics, durability
    Reliability score
    48Medium
    Where the price path tends to go next313 observed
    • Stable consensus94%
    • Choppy / mean-reverting5%

    Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

    DurabilityHigh· half-life ~4w
    PredictabilityStable

    Secondary read: leaning toward Quote-driven.

    A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

    Market data

    24h volume

    $61K

    Liquidity

    $29.5K

    Total volume

    $216.8K

    Category
    Geopolitics
    Venue
    Polymarket
    Open interest
    —
    Spread
    1.0 pts
    Best bid
    29.0%
    Best ask
    30.0%
    7-day range
    29.5% – 29.5%
    Resolves
    Sep 21, 2026

    Depth of the order book and volume

    Trust breakdown

    74/100 · Medium

    Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

    • Liquidity anchor+54
    • Price steadiness+30
    • Limited history-8
    Trust score74 / 100
    How these scores work →
    View on Polymarket

    ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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    Macro / Fed
    Politics
    AI / Tech
    Geopolitics

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    Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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