Trade: Will Iran close the Strait of Hormuz by...?

Market context

The Strait of Hormuz remains the world's most critical oil chokepoint, with roughly 20% of global petroleum passing through its 21-nautical-mile width daily. Iran has repeatedly threatened to close or blockade the waterway during periods of heightened tension with the United States and its regional allies, particularly following sanctions escalations or military confrontations. A closure would constitute either a complete halt to traffic or severe restrictions that materially disrupt commerce, as defined by this market's settlement criteria through 31 December 2026.

Historical precedent suggests Iran has threatened closure far more frequently than it has attempted implementation. During the 1980s Iran-Iraq War, Iran briefly disrupted shipping but never achieved a sustained blockade despite possessing the military capability. More recently, Iranian officials issued closure threats in 2019 following the assassination of General Qasem Soleimani and again during 2022 nuclear negotiations, yet no actual closure occurred. The current 100% implied probability on Polymarket's order book appears disconnected from this historical pattern of rhetorical escalation without follow-through.

Traders should monitor several near-term catalysts: ongoing negotiations regarding the Joint Comprehensive Plan of Action, any new US sanctions regimes, and Iranian domestic political developments ahead of 2026. Recent reporting from Reuters and regional analysts suggests current tensions, whilst elevated, remain below the threshold that previously triggered Iranian closure threats. The market's extreme probability may reflect either a significant shift in underlying risk assessment or mispricing relative to historical closure attempts and Iran's demonstrated reluctance to sustain such actions despite repeated capability.

How this market resolves

Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.

How to trade this market step by step

The mechanics for trading "Will Iran close the Strait of Hormuz by...?" are the same as any other PolyGram event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.

1. Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
2. Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
3. Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
4. Size your position. If you stake 100 USDC at 50% YES, you'll receive shares that pay $200 if YES resolves true — a 100% gross return. If NO resolves, your shares are worth $0.
5. Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
6. Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.

How active is this market?

$5.8M in lifetime turnover and $0 of resting liquidity puts this market in the top 2% by volume for foreign policy contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.

The market has been open for 6 months — long enough that the order book is mature and price is well-anchored to fundamentals.

Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.

Key terms

YES / NO share

A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.

CLOB

Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.

Liquidity

USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.

UMA optimistic oracle

The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.

Slippage

The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.

Conditional token

ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.

See the full prediction-market glossary →

Frequently asked questions

Risk and regulatory note

Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.

Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.

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