Will Frances Tiafoe win a Tennis Grand Slam in 2026?

Prediction markets currently give a 3% probability that Will Frances Tiafoe win a Tennis Grand Slam in 2026?. This contract trades at 3¢ on Kalshi, closing December 31, 2026. This market shows extreme mispricing with a 4571% implied yield on the Yes side, suggesting the 3¢ price significantly undervalues Tiafoe's Grand Slam chances despite his career trajectory and two years of opportunity.

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3¢
Bid/Ask 0/3¢·Spread 3¢·Vol $0·OI $494·Closes Dec 31, 2026·253d remaining
KXATPGRANDSLAM-26-FTIA

Analysis

4d ago

This market shows extreme mispricing with a 4571% implied yield on the Yes side, suggesting the 3¢ price significantly undervalues Tiafoe's Grand Slam chances despite his career trajectory and two years of opportunity. The $0 24-hour volume and $494 open interest indicate severe illiquidity, making the theoretical yield potentially unrealizable—the tight 3¢ spread masks a market where actual execution at posted prices may be impossible. With 258 days to expiry and a Cliff Risk Index of 32, this appears to be a classic low-liquidity mispricing rather than a genuine market consensus, though Tiafoe's historical Grand Slam performance (career-high quarterfinal) does support some skepticism of his odds.

Resolution rules

If Frances Tiafoe 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
0.5
Spread
3¢
Computed
4/21/2026, 8:18:45 PM
Indicators computed 4/21/2026, 8:08:17 PM

Trade

View on kalshisf trade KXATPGRANDSLAM-26-FTIA yes 100

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