Tankers turn back after attacks, Polymarket sees 57.5% Hormuz normal by Dec 31

Strait of Hormuz tanker turnbacks after vessel attacks send Polymarket “traffic returns to normal” odds sliding

A report that four oil and gas tankers turned back from the Strait of Hormuz after vessel attacks has coincided with a sharp repricing in Polymarket’s “Strait of Hormuz traffic returns to normal by December 31?” contract. The market’s implied probability for a return to normal traffic has fallen to 57.5% from 85.5%.

Key Takeaways

• Polymarket prices a 57.5% chance that Strait of Hormuz traffic returns to normal by Dec. 31, 2026.
• Traders marked the contract lower after reports that four oil and gas tankers turned back following vessel attacks.
• The market resolves on Dec. 31, 2026; “Yes” is 57.5% and “No” is 42.5% at the latest update.

Four oil and gas tankers turned back from the Strait of Hormuz after vessel attacks, according to a report published on July 8, 2026. The incident affected shipping activity linked to energy cargoes moving through the waterway. The report described the vessels as reversing course in response to the attacks. The development highlights the operational risk for commercial traffic in the strait. It also underscores how security incidents can disrupt routing decisions for tankers transiting the area.

Polymarket pricing update: Yes drops to 57.5% from 85.5% as matched volume hits $4.55M

On Polymarket, the “Strait of Hormuz traffic returns to normal by December 31?” market shows Yes at 57.5% versus No at 42.5%, a 28-point drop from the prior 85.5% reading for Yes. Total matched volume stands at $4,547,172, indicating sustained liquidity even as sentiment shifted. With Yes still leading but only by 15 points, pricing implies traders see a meaningful risk that normal traffic conditions are not restored by the Dec. 31, 2026 resolution date.

Traders will watch for further shifts in the Yes/No spread and whether volume accelerates as the market approaches the Dec. 31, 2026 resolution date.

Beyond the Strait of Hormuz: other high-volume geopolitical and macro contracts Polymarket traders are watching

Beyond the longer-dated Strait question, Polymarket activity is also clustering around adjacent Iran-linked timelines and nearer-term shipping benchmarks. In “US-Iran Final Nuclear Deal by…?”, the leading outcome “December 31” implies 36.0% with $8,484,573 matched, while “Iran announces withdrawal from MOU negotiations by…?” has “August 15” at 31.0% on $3,223,750. On the shorter horizon, traders are leaning heavily toward disruption persisting, with “Strait of Hormuz traffic returns to normal by July 31?” pricing “No” at 95.5% on $13,251,093 and “Strait of Hormuz traffic returns to normal by July 15?” at 99.25% for “No” on $8,135,837.

Odds Trend

By the Numbers

• Platform: Polymarket
• Market: Strait of Hormuz traffic returns to normal by December 31?
• Resolution window: Dec 31, 2026 (UTC)
• Status: Active (open for trading)
• Leading implied prob.: 57.5%
• Volume: ~$4,547,172
• Top outcomes: Yes: Yes 57.5% / No 42.5%; No: Yes 57.5% / No 42.5%

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