Will Coco Gauff win the 2026 Women’s US Open?
A repricing with partial backing — read the new probability with some caution.
The pricing has partial support: healthy trading volume and market depth, a tight spread.
How credible was the move?
Three separate questions — a move can be genuine while the latest price is still settling. Methodology →
Move validity
Is the move backed by real trading and depth?
ModerateThe pricing has partial support: healthy trading volume and market depth, a tight spread.
Consensus stability
Has the market settled at the new probability?
FormingMovement has slowed (3.1 points over six hours) but the market has not fully settled.
Contract clarity
Will the rules resolve without ambiguity?
HighThe resolution rules are relatively specific, with a named source and a defined deadline.
From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.
What this market actually measures
The 2026 U.S. Open tennis tournament is scheduled for August 23 - September 13, 2026.
This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.
View full official resolution rules
The 2026 U.S. Open tennis tournament is scheduled for August 23 - September 13, 2026. This market will resolve to the player that wins the 2026 U.S. Open Women’s Singles Tournament. If at any point it becomes impossible for a listed player to win the 2026 U.S. Open Women’s Singles Tournament per the rules of the tournament, the corresponding market will resolve to “No”. If the 2026 U.S. Open Women’s Singles Tournament is cancelled, postponed after October 31, 2026, or there is otherwise no winner declared within that timeframe, this market will resolve to “Other”. The primary resolution source will be official information from the U.S. Open (https://www.usopen.org/index.html); however, a consensus of credible reporting may also be used.
Why the odds moved
The probability fell 3.1 percentage points over the last 24 hours (28.0% → 24.9%).
No verified catalyst has been linked to this move yet. ProbCast does not attribute moves to news without evidence connecting the timing of a specific report to the repricing.
What could move this market next?
- The scheduled event takes placeSeptember 12, 2026 at 8:00 PM ET
The contract resolves on the event's outcome.
Derived from the contract's own mechanics as of Sep 9, 7:21 PM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.
Advanced analysis (experimental)
Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: medium · expected error ±22 pts.
What's happening
A sustained one-directional drift. This can be a genuine trend or crowd herding; watch whether liquidity and breadth confirm the move.
- Directional drift sustained across 1h / 6h / 24h windows
Read the latest price with caution; conditions make it an unreliable summary right now.
More details — reliability score, dynamics, durability
- Trend continuation58%
- News repricing14%
- Stable consensus14%
Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.
Secondary read: leaning toward Reacting to news.
A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.
Market data
24h volume
$68.8K
Liquidity
$29K
Total volume
$274.5K
- Category
- Macro / Fed
- Venue
- Polymarket
- Open interest
- —
- Spread
- 0.7 pts
- Best bid
- 24.5%
- Best ask
- 25.2%
- 7-day range
- 24.9% – 28.0%
- Resolves
- Sep 12, 2026