Will Ben Shelton win a Tennis Grand Slam in 2026?

Prediction markets currently give a 5% probability that Will Ben Shelton win a Tennis Grand Slam in 2026?. This contract trades at 5¢ on Kalshi, closing December 31, 2026. This market displays extreme mispricing with a 3393% implied yield on the Yes side, suggesting the 3¢ price significantly undervalues Shelton's Grand Slam prospects despite his rapid rise in professional tennis rankings.

██░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
5¢
Bid/Ask 3/5¢·Spread 2¢·Vol $200·OI $3,821·Closes Dec 31, 2026·253d remaining
KXATPGRANDSLAM-26-BSHE
7-day price4 snapshots · 2 regime
4¢3¢ current
Apr 152¢Apr 19

Analysis

4d ago

This market displays extreme mispricing with a 3393% implied yield on the Yes side, suggesting the 3¢ price significantly undervalues Shelton's Grand Slam prospects despite his rapid rise in professional tennis rankings. The zero 24-hour volume and modest $3,621 open interest indicate severe illiquidity, making the tight 1¢ spread potentially misleading as a true market indicator. The recent price spike from 2¢ to 4¢ over seven days combined with a moderate 24 Cliff Risk Index warrants caution, as thin liquidity could amplify volatility as the market approaches its late-2026 expiration.

Resolution rules

If Ben Shelton wins a tennis major (the Australian Open, the U.S. Open, the French Open, or Wimbledon) before Dec 31, 2026, then the market resolves to Yes.

Indicators

IY (Yes) 4657.9%
IY (No) 4.5%
Adj IY 2329%
CRI 32
Overround 0.2%
▶ Full indicator table (5)
IndicatorValue
IY (Yes)4657.9%
IY (No)4.5%
Adj IY2329%
CRI32
Overround0.2%

Regime

Label
neutral
Score
0.341
Spread
2¢
Computed
4/21/2026, 8:19:27 PM
Observability lowEvent type sports
Indicators computed 4/21/2026, 8:08:17 PM

Trade

View on kalshisf trade KXATPGRANDSLAM-26-BSHE yes 100

Related concepts

Related Prediction Market Questions