Polymarket

Polymarket Nears Certainty: Strait of Hormuz Effectively Closed Amid Escalating Iran Conflict

A Polymarket prediction market on the closure of the Strait of Hormuz by March 31, 2026, is pricing a near 100% probability of 'Yes', reflecting the ongoing severe disruption to maritime traffic following recent US-Israeli strikes on Iran and subsequent Iranian retaliation.

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— 3 min read

The prediction market on Polymarket, asking "Will Iran close the Strait of Hormuz by March 31?", currently reflects an overwhelming consensus for a 'Yes' outcome, with prices for this resolution standing at 0.9995. This near-certainty among traders underscores the severe and ongoing disruption to international maritime traffic through the critical waterway, a situation that has rapidly escalated since late February 2026.

The Strait of Hormuz, a narrow passage between Iran and Oman, is arguably the world's most vital energy chokepoint, through which approximately 20% of global oil consumption and significant volumes of liquefied natural gas (LNG) normally transit daily. Its closure, or even severe restriction, carries immense geopolitical and economic consequences, threatening global energy security and supply chains. The International Energy Agency (IEA) has warned that the current crisis is creating "the largest supply disruption in the history of the global oil market".

Recent developments paint a clear picture of an effectively closed, or severely restricted, strait. The crisis began around February 28, 2026, following joint military strikes by the United States and Israel on Iranian military and civilian targets, which reportedly included the killing of Iran's Supreme Leader Ayatollah Ali Khamenei. Iran swiftly retaliated with widespread missile and drone attacks across the region targeting US, Israeli, and Gulf ally assets.

Crucially, an Islamic Revolutionary Guard Corps (IRGC) commander declared the Strait of Hormuz "closed" on March 2, 2026, issuing threats to "set ablaze" any vessel attempting passage. This has been reinforced by statements from Iran's Supreme Leader Ayatollah Mojtaba Khamenei on March 12, 2026, asserting that the leverage of closing the Strait should be utilized and attacks on Gulf Arab neighbors would persist. While not a formal legal blockade, these actions and threats have rendered the strait too dangerous for most commercial vessels.

Consequently, commercial shipping through the Strait has effectively halted. As of early March, at least 150 tankers were observed anchored in open Gulf waters. Major shipping lines, including Maersk, CMA CGM, and Hapag-Lloyd, have suspended transits entirely, with many vessels rerouting around the Cape of Good Hope, adding considerable delays. Vessel tracking data indicates that oil traffic has plummeted by approximately 70% before falling to near zero, with only Iranian-flagged or linked vessels reportedly attempting passage. Furthermore, war-risk insurance for vessels operating in the region has either been withdrawn or become prohibitively expensive, making transit commercially unfeasible for most operators. Reports also suggest Iran may be deploying naval mines, further exacerbating the risk.

The exceptionally high trading volume of over $43 million and the near-100% probability on Polymarket for a 'Yes' resolution by March 31 reflect the market's assessment that Iran has indeed "halted or severely restricted international maritime traffic" through the Strait. This aligns with the consensus of credible reporting, which indicates that while the Strait may not be legally blockaded, the practical reality for international shipping is one of significant closure due to kinetic threats, attacks on vessels, and the withdrawal of essential insurance coverage. The global energy markets have reacted sharply, with Brent crude prices surging towards $120 per barrel, signaling the profound economic impact of this unprecedented disruption.

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Market data fetched at 2026-03-12 14:57 UTC | Polymarket ID: 1227361

This article is generated by AI for informational purposes only. It does not constitute financial advice. Always do your own research before making any investment decisions. Data sourced from Polymarket and public web sources.

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