US strikes Iran again after Hormuz tanker hit; Polymarket sees 99.95% by Aug 31
Rongchai Wang
Jun 28, 2026 00:21
On the second day of renewed action, the U.S. struck Iranian surveillance, air-defense, and drone sites after the Panama-flagged tanker Kiku was hit in the Strait of Hormuz around 4:30 a.m. ET.
US strikes Iran again after Hormuz tanker hit; Polymarket sees 99.95% by Aug 31
U.S. Strikes Iran After Strait of Hormuz Drone Hit: Polymarket Prices “Iran Targets Shipping” Near Certainty
The United States carried out a second night of strikes on Iran after a commercial vessel was hit by a drone in the Strait of Hormuz, raising fresh questions about the durability of a June 17 ceasefire memorandum. On Polymarket, traders priced the “Iran successfully targets shipping by…?” ladder near certainty across multiple date strikes.
Key Takeaways
Polymarket’s leading line implies a 99.95% chance that Iran successfully targets shipping by the August 31 strike.Traders repriced after reports of renewed U.S. strikes on Iran tied to alleged attacks on commercial vessels transiting the Strait of Hormuz.The contract’s listed resolution date is 2026-07-31 23:59 UTC, while the ladder includes strikes from June 27 through August 31.
The United States launched a second day of strikes on Iran, citing an attack on a commercial vessel as the trigger for renewed military action. U.S. Central Command said the strikes targeted Iranian surveillance and communications infrastructure, air defense sites, drone storage facilities, and capabilities linked to laying mines. Explosions were reported in southern Iran near the port of Sirik, and state media indicated Qeshm Island was also hit. The escalation followed an incident in which the Panama-flagged tanker Kiku was reportedly struck by an unidentified projectile while transiting the Strait of Hormuz at about 4:30 a.m. Eastern time, with no injuries and no reported leakage despite CENTCOM saying it was carrying more than 2 million barrels of crude. The renewed fighting was framed as another sign that a June 17 memorandum of understanding underpinning a ceasefire between the U.S. and Iran may be close to breaking.
Polymarket Odds and Volume: $450,254 Matched as August 31 Strike Hits 99.95% Yes (+21.9pp in 24 Hours)
Polymarket showed $450,254 in matched volume on the “Iran successfully targets shipping by…?” ladder, with pricing clustered at the top of the range. The August 31 strike traded at 99.95% Yes versus 0.05% No, and the July 31, July 15, July 7, and June 27 strikes were each marked 99.95% Yes / 0.05% No. The earliest listed line with any visible discount was June 30 at 99.6% Yes and 0.4% No, indicating only a small residual bid for a miss on the tighter timeline. The contract’s headline odds moved from 99.9% to 99.95%, and the 24-hour change in the summary data was +21.9 percentage points, consistent with heavily one-sided positioning toward a “Yes” resolution across strikes.
Watch for additional changes in per-strike pricing, especially whether the June 30 line tightens toward 99.95% like the later strikes, and monitor volume for signs of two-way liquidity returning ahead of the 2026-07-31 23:59 UTC resolution date.
Beyond the Hormuz Escalation: Other High-Volume Geopolitical and Macro Contracts Polymarket Traders Are Watching
Beyond the shipping-risk ladder, Polymarket flows are clustering around adjacent geopolitical and macro signposts, led by 99.95% “No” on “Will the Iranian regime fall by June 30?” with $65,626,158 matched. Traders are also leaning 98.15% “No” on “Strait of Hormuz traffic returns to normal by end of June?” ($38,368,005), while the longer-dated “Strait of Hormuz traffic returns to normal by July 31?” sits at 59.5% “No” ($10,254,925). On the diplomacy track, “US-Iran Final Nuclear Deal by…?” prices the leading outcome “December 31” at 44.5% with $2,750,453 in volume.
Odds Trend
WindowChange (pp)24h+21.97d+21.9
Implied odds (last 48h)255075100Odds %June 30August 31July 7June 27
By the Numbers
Platform: PolymarketMarket: Iran successfully targets shipping by…?Contract type: Price strike ladder: each rung has separate Yes/No; Yes means the spot price is above that USD strike at settlement.Resolution window: Jul 31, 2026 (UTC)Status: Active (open for trading)Volume: ~$450,254
Top strike rungs
StrikeYesNoAugust 31100.0%0.1%July 7100.0%0.1%June 27100.0%0.1%July 15100.0%0.1%
+2 more strikes not shown
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