The probability that 30 ships will transit the Strait of Hormuz on any day by July 31, 2026, fell sharply on Polymarket, with the YES contract price dropping 49.9 percentage points from 92.7% to 42.9% in the past 24 hours. This sudden repricing contrasts with whale activity, which saw $36K net flow into YES contracts, driven by $66K in whale buys against $30K in sells across 92 unique whales.
The divergence between price action and whale flow is notable: while the market odds collapsed, whales increased their exposure to YES, indicating a split between broader market sentiment and large trader positioning. Polymarket’s 24-hour volume for this contract totaled $50K, contributing to a lifetime volume of $111K with 201 unique traders participating overall.
Adding complexity, the Polymarket Breaking YES price at 42.9% contrasts sharply with the Polydata on-chain mid-price at 96.4%, suggesting a significant discrepancy between the exchange price and blockchain data.
This combination of a steep decline in market-implied probability alongside increased whale buying signals a contested outlook on the likelihood of 30 ships transiting the Strait of Hormuz by the deadline. The opposing forces in price and whale flow reflect uncertainty and differing interpretations of evolving geopolitical or logistical factors affecting this maritime event.
| Market | Will 30 ships transit the Strait of Hormuz on any day by July 31, 2026? |
|---|---|
| Market ID | 2820499 |
| 24h price change | +49.9 pp |
| YES now (PM Breaking) | 42.9% |
| YES ~24h ago (est.) | 92.7% |
| YES (Polydata overview) | 96.4% |
| Whale net flow (24h) | $36K |
| Whale buy / sell (24h) | $66K / $30K |
| Unique whales (24h) | 92 |
| Volume 24h (PM) | $50K |
| Unique traders (Polydata) | 201 |
Source: Polydata API v3 · /whales/flow + Polymarket Breaking · snapshot 2026-07-15. Data: Polydata API v3. On-chain figures are public. Realized PnL is computed over resolved markets only and excludes open positions, so it is conservative versus the Polymarket UI. This is not investment advice.