The market for “Will the US announce a blockade on Iran by July 31?” saw a sharp drop in its YES contract price, falling 22.0 percentage points over the past 24 hours from 50.5% to 28.5%, according to the Polymarket Breaking feed on July 13.
Despite this significant decline in odds, whale activity moved in the opposite direction. Large traders collectively bought $274K worth of YES contracts and sold $120K, resulting in a net whale inflow of $154K into YES positions. This divergence between whale flow and price movement is unusual and flagged by Polydata as flow diverging from price.
Over the same period, total Polymarket volume on this question reached $230K, with 276 unique whales participating among 1,068 total unique traders since the market’s inception. The lifetime volume on this market sits at $1.11M, reflecting sustained interest in US-Iran geopolitical developments.
This conflicting data suggests that while the broader market is pricing in a much lower likelihood of a blockade announcement by the end of July, whales are accumulating YES positions aggressively.
The combined price decline alongside strong whale buying highlights a complex market dynamic where headline odds and large trader behavior send mixed signals on the prospect of a US blockade against Iran by the end of the month.
| Market | Will the US announce a blockade on Iran by July 31? |
|---|---|
| Market ID | 2643405 |
| 24h price change | +22.0 pp |
| YES now (PM Breaking) | 28.5% |
| YES ~24h ago (est.) | 50.5% |
| YES (Polydata overview) | 25.5% |
| Whale net flow (24h) | $154K |
| Whale buy / sell (24h) | $274K / $120K |
| Unique whales (24h) | 276 |
| Volume 24h (PM) | $230K |
| Unique traders (Polydata) | 1,068 |
Source: Polydata API v3 · /whales/flow + Polymarket Breaking · snapshot 2026-07-13. 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.