KalshiCheck availabilityKYC requiredVerified resolution dataWell calibratedData quality warningNo trading activity
Data as of Oct 26, 2026, 12:03 AM UTC · policy pm-quality-4
Selected book midpoint
1+ Grand Slam wins · —
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Stored price
1+ Grand Slam wins 50%
1+ Grand Slam wins 50%Market quality
22 / 100
Low quality24h Volume
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Open interest
$0
Open interest unknownBid / Ask
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1+ Grand Slam winsSpread
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Market data
Updated 17 minutes ago
Oct 21, 26, 8:00 PM UTCDec 31, 27, 3:00 PM UTC
Chart and changes show stored historical probabilities, not the selected live book.
Trends
Selected row: book midpoint. Other rows: stored references, possibly normalized; 24h changes use stored history.
Venue terms
Source: Kalshi
Informational venue terms only; CoinRithm paper trading uses its own rules.
- Early close:
- Yes
- Settlement timer:
- 5m (informational)
Market depth · 1+ Grand Slam wins
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Rules
If Carlos Alcaraz wins at least 1 singles tennis Grand Slam in 2027 , then the market resolves to Yes.
- A tennis Grand Slam refers to the singles competition at one of the four major annual tournaments officially designated by the sport’s governing bodies: the Australian Open, French Open, Wimbledon, and the US Open. Doubles and mixed doubles competitions are excluded. Kalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.
Rules for each outcome
- 1+ Grand Slam wins
- If Carlos Alcaraz wins at least 1 singles tennis Grand Slam in 2027 , then the market resolves to Yes.
- 2+ Grand Slam wins
- If Carlos Alcaraz wins at least 2 singles tennis Grand Slams in 2027 , then the market resolves to Yes.
- 3+ Grand Slam wins
- If Carlos Alcaraz wins at least 3 singles tennis Grand Slams in 2027 , then the market resolves to Yes.
- 4 Grand Slam wins
- If Carlos Alcaraz wins exactly 4 singles tennis Grand Slams in 2027 , then the market resolves to Yes.
