Polymarket’s prediction for whether SpaceX Starship Flight Test 13 will launch by July 17 saw a dramatic reversal over 24 hours, with the YES price collapsing 79.8 percentage points from 80.5% down to 0.75%.
Despite this steep decline in market-implied probability, whale activity diverged from the price move. Large traders collectively increased their exposure to the YES side by a net $28K, buying $45K worth of YES contracts while selling only $16K, across 82 unique whales. This contrasts with the overall market volume, which totaled $39K in the same period, indicating whales accounted for a significant share of the trading.
The lifetime market volume stands at $41K with 158 unique traders participating, underscoring that recent whale flow has been unusually heavy relative to historical activity. The divergence between price and whale flow suggests that while the broader market sharply downgraded the odds of a July 17 launch, major traders are betting against that trend.
This split between price and whale behavior highlights a contested outlook on the Starship test timeline, with the market pricing near-zero probability of launch but whales maintaining substantial conviction in a successful flight by the deadline.
| Market | Will SpaceX Starship Flight Test 13 launch by July 17? |
|---|---|
| Market ID | 2911983 |
| 24h price change | +79.8 pp |
| YES now (PM Breaking) | 0.75% |
| YES ~24h ago (est.) | 80.5% |
| YES (Polydata overview) | 0.75% |
| Whale net flow (24h) | $28K |
| Whale buy / sell (24h) | $45K / $16K |
| Unique whales (24h) | 82 |
| Volume 24h (PM) | $39K |
| Unique traders (Polydata) | 158 |
Source: Polydata API v3 · /whales/flow + Polymarket Breaking · snapshot 2026-07-17. 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.