"US-Iran Blockade: Markets Say No End by December 31 as Hormuz Stays Shut"

The Strait of Hormuz is closed in everything but name, and the prediction markets are telling a story that is neither panic nor optimism. They expect the standoff to last. That is the quiet, expensive message inside a cluster of Polymarket prices I checked on October 26: traders give the United States only a 34.7% chance of announcing an end to its naval blockade of Iran by December 31, and only a 5.5% chance of doing so by October 31. The blockade, in the market's reading, is not about to be lifted in days, and probably not in weeks either.

The blockade itself dates to July. On July 13, President Trump announced the United States would reinstate its naval blockade of Iran, targeting Iranian ships and ships of Iranian customers. By early October, US Central Command said it had disabled four commercial vessels, turned around 135 ships, and destroyed ten tankers linked to the Revolutionary Guard's shadow network. The Strait, meanwhile, has effectively stopped functioning as a commercial waterway. IMF PortWatch recorded just four transits on October 18, against a pre-crisis baseline of 85 per day. The International Maritime Organization confirmed 27 attacks on commercial ships in the Strait during October, the highest monthly total since the conflict began. Brent crude settled at $116.72, up 3.14% in the last session before the close, a price that already carries a war premium.

Diplomacy, such as it is, runs on two contradictory tracks. On October 18, Iranian Foreign Minister Abbas Araghchi said in Baghdad that Iran's offer to reopen the Strait within seven days was still on the table. A Saudi outlet then reported that Tehran had offered, via Pakistan as mediator, to open the Strait if Washington lifted the blockade. On October 25, the Revolutionary Guard-affiliated Tasnim news agency denied that any such proposal had been made to the United States or to Pakistan, calling the reports "a lie and fabrication." Trump, for his part, has kept both doors open at once: he said a deal with Iran remained possible, while also saying he could authorize fresh strikes "maybe tomorrow," warning of "another little Epic Fury" if Tehran does not agree, and sending a third carrier strike group with roughly 10,000 additional sailors and Marines to the region. The Revolutionary Guard claims it controls the Strait and says two supertankers carrying more than 4.5 million barrels of crude struck mines on an unauthorised route, a claim independent observers have not verified.

Read together, these prices draw a shape I find more informative than any single number. Traders are not pricing an imminent war: an invasion before 2027 sits at just 18.5%, despite the strike threats and the carrier buildup. They are also not pricing an imminent peace: normal traffic through the Strait by December 31 is only 11.5%, and an end to the blockade by then is barely one in three. What they are pricing is a grinding status quo, in which a ceasefire of sorts holds at 85.5% through October 31 while nothing fundamental changes. The gap between the October 31 blockade price (5.5%) and the December 31 price (34.7%) is the market saying that time, not any single event, is the only thing that might soften this standoff, and even then only maybe.

So my prediction is for the status quo to outlast the year: the United States will not publicly announce the end of its naval blockade of Iran by December 31, 2026. I put that at 62%, a little below the market's implied 65.3% for "No." The small discount is deliberate. Trump has publicly kept a deal on the table, Araghchi's seven-day offer has never been formally withdrawn, and a genuine agreement would by definition end the blockade, so the path to "Yes" is real even if it is narrow. But the weight of the evidence points the other way: Tehran has just denied that any new proposal even exists, Washington is adding warships rather than removing them, and the market itself sees almost no chance of an announcement within days. A standoff that has already survived three months of blockade, a closed strait, and a record month of ship attacks does not look like one that unwinds before New Year. If I am wrong, the most likely way is also the most welcome one: a quiet deal, announced without warning, that makes the blockade a footnote rather than a fixture.