The Polymarket contract “Will the US announce a blockade on Iran by August 31?” surged sharply over the past 24 hours, with the YES price climbing from 32.0% to 63.0%, a 31.0 percentage point increase. This marked repricing reflects a significant shift in market sentiment within a single day.
Supporting the price move, whale activity aligned closely with the tape, as $20K net flowed into YES positions amid $36K in whale buy volume and $16K in sell volume. A total of 83 unique whales participated in this buying pressure, underscoring broad large-player conviction behind the rally. Overall, Polymarket recorded $44K in 24-hour volume on this contract, which has amassed a lifetime volume of $109K and attracted 203 unique traders.
Interestingly, the Polymarket Breaking YES price at 63.0% contrasts with the Polydata on-chain midprice of 35.5%, suggesting some divergence between the live market price and the broader on-chain valuation. Nonetheless, the combined price surge and whale buying indicate a strong consensus among major traders that the likelihood of a US blockade announcement by August 31 has increased materially.
This coordinated price and whale flow action signals a notable shift in expectations on this geopolitical event, highlighting the market’s responsiveness to emerging developments or information flows around US-Iran relations.
| Market | Will the US announce a blockade on Iran by August 31? |
|---|---|
| Market ID | 2821347 |
| 24h price change | +31.0 pp |
| YES now (PM Breaking) | 63.0% |
| YES ~24h ago (est.) | 32.0% |
| YES (Polydata overview) | 35.5% |
| Whale net flow (24h) | $20K |
| Whale buy / sell (24h) | $36K / $16K |
| Unique whales (24h) | 83 |
| Volume 24h (PM) | $44K |
| Unique traders (Polydata) | 203 |
Source: Polydata API v3 · /whales/flow + Polymarket Breaking · snapshot 2026-07-12. 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.