The Polymarket contract “US x Iran Effective Ceasefire by July 31?” saw its YES price plunge 41.5 percentage points over the past 24 hours, dropping from an estimated 64.0% to 22.5% as of July 16. This steep sell-off signals a major shift in market sentiment against a ceasefire being reached by the deadline.
Contrary to the market’s sharp downward revaluation, whale activity diverged from the price trend. Despite the YES price decline, large traders increased their net exposure to YES, indicating a disconnect between the tape and whale flow. Total trading volume for the contract in the last 24 hours was $16K, reflecting moderate liquidity amid the volatility.
This divergence suggests that while retail or smaller participants rapidly adjusted their probabilities downward, whales maintained or grew their conviction in the ceasefire outcome. The juxtaposition of plummeting prices with rising whale bets highlights a complex narrative where significant bettors see value that the broader market is discounting.
Overall, the combined price collapse and opposing whale flow illustrate a contested market view on the likelihood of a US-Iran ceasefire by July 31, underscoring ongoing uncertainty and differing interpretations of geopolitical developments among market participants.
| Market | US x Iran Effective Ceasefire by July 31? |
|---|---|
| Market ID | 2937525 |
| 24h price change | +41.5 pp |
| YES now (PM Breaking) | 22.5% |
| YES ~24h ago (est.) | 64.0% |
| YES (Polydata overview) | — |
| Whale net flow (24h) | $0 |
| Whale buy / sell (24h) | — / — |
| Unique whales (24h) | — |
| Volume 24h (PM) | $16K |
| Unique traders (Polydata) | — |
Source: Polydata API v3 · /whales/flow + Polymarket Breaking · snapshot 2026-07-16. 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.