Strait of Hormuz traffic returns to normal by September 15?

Prediction markets put the probability at 8%: Strait of Hormuz traffic returns to normal by September 15. Currently, markets see this as unlikely (8% YES).

What’s Happening

Trading on Kalshi now places just an 8% probability that Strait of Hormuz traffic returns to normal by September 15, a sharp decline from the 57% odds assigned to a September 1 reopening as recently as early May. The contract, which resolves based on a 7-day moving average of transit counts through the waterway, has drawn $16.1 million in total volume, with $1.4 million traded in a single 24-hour period in August. This shift reflects a market consensus that the dual constraints—Iran’s refusal to lift its closure and the U.S. naval blockade—will persist well beyond the late-summer window that traders previously favored. [CNBC, Mon May 04]

The deteriorating odds carry direct implications for global energy markets, as roughly 20% of the world’s oil and liquefied natural gas passes through the strait daily. While the U.S. and Iran have maintained a ceasefire, neither side has signaled a concrete timeline for reopening the passageway, and the Kalshi ladder now prices only a 45% chance of normalization before January 2027. Independent AI models analyzing the same contract structure returned even lower estimates, suggesting the current 8% YES price for the September 15 deadline may still overstate the likelihood of a near-term resolution. The market’s sustained liquidity indicates institutional hedging against prolonged disruption to tanker routes. [OddsShopper, Wed Aug 05]

Looking ahead, the next major catalyst is whether the U.S. Navy adjusts its blockade posture or Iran issues a formal navigation notice, either of which could trigger a rapid repricing of the September 15 contract. The market’s current 92% NO position aligns with the broader trend across the deadline ladder, where odds for an August reopening collapsed from 57% in mid-June to single digits by early August. Traders are now watching for any diplomatic breakthrough at the UN Security Council or a unilateral Iranian concession, as the absence of such events has consistently pushed the expected reopening date further into 2027. The contract’s resolution mechanism—based on verified transit data rather than subjective reports—keeps the market anchored to measurable shipping activity. [StartupHub.ai, Mon Aug 10]

Traded on Polymarket — $91K Volume

Lower-volume market on Polymarket ($91K). Wider spreads expected — enter with limit orders and be aware of slippage risk. Currently 8c YES.