The probability that the Israel and Iran ceasefire will continue through July 31 plummeted 22.5 percentage points within 24 hours on Polymarket, sliding from 61.5% to 39.0% as of the latest snapshot on July 19.
This downward repricing took place amid $41K in volume over the day but ran counter to whale flow, which diverged from the price move. While the market consensus shifted decisively lower on the likelihood of the ceasefire holding, large traders did not follow suit, indicating a disconnect between retail or smaller trader sentiment and whale positioning.
The divergence between price direction and whale activity suggests that despite the sharp fall in odds, significant capital has not moved aggressively out of the YES side.
The combination of a steep 22.5 pp drop in the implied probability and contrasting whale flow highlights uncertainty or conflicting views on the ceasefire’s durability. Such a pattern implies the market is undergoing a revaluation phase, with whales potentially awaiting clearer signals before aligning their positions with the recent price declines.
| Market | Israel x Iran ceasefire continues through July 31? |
|---|---|
| Market ID | 2952486 |
| 24h price change | +22.5 pp |
| YES now (PM Breaking) | 39.0% |
| YES ~24h ago (est.) | 61.5% |
| YES (Polydata overview) | — |
| Whale net flow (24h) | $0 |
| Whale buy / sell (24h) | — / — |
| Unique whales (24h) | — |
| Volume 24h (PM) | $41K |
| Unique traders (Polydata) | — |
Source: Polydata API v3 · /whales/flow + Polymarket Breaking · snapshot 2026-07-19. 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.