The probability that the US will announce a blockade on Iran by August 31 surged 21.0 percentage points over the last 24 hours, rising from 31.5% to 52.5% on Polymarket’s breaking feed as of July 12, 2026. This sizeable repricing was supported by whale activity, with 90 unique whales contributing a net flow of $22K into YES contracts during the same period. Whale buy volume stood at $39K, outweighing $18K in sell volume, indicating alignment between large traders and the price move.
Polymarket’s total 24-hour volume on this market reached $48K, contributing to a lifetime volume of $114K and involving 211 unique traders overall. Notably, Polydata’s on-chain overview price for YES contracts was 35.5%, significantly lower than the 52.5% reflected on Polymarket’s breaking feed, suggesting some divergence between on-chain mid prices and real-time market sentiment.
The coordinated rise in both price and whale buying signals increased conviction among large participants that a US blockade announcement is becoming more likely before the August 31 deadline. This convergence of price action and whale flow highlights a meaningful shift in market expectations rather than speculative noise.
| Market | Will the US announce a blockade on Iran by August 31? |
|---|---|
| Market ID | 2821347 |
| 24h price change | +21.0 pp |
| YES now (PM Breaking) | 52.5% |
| YES ~24h ago (est.) | 31.5% |
| YES (Polydata overview) | 35.5% |
| Whale net flow (24h) | $22K |
| Whale buy / sell (24h) | $39K / $18K |
| Unique whales (24h) | 90 |
| Volume 24h (PM) | $48K |
| Unique traders (Polydata) | 211 |
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.