Pair #9933

Antecedent (if this happens)

KXATP-26USO-TIA

Will Frances Tiafoe win the US Open Men's Singles?

Series: KXATP
Entity: Frances Tiafoe
Expiration: 2026-09-14T05:00:00Z
Volume: 4799

YES ask: 0.0100
NO ask: 1.0000
Last: 0.0100

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Rules

If Frances Tiafoe wins the 2026 US Open Men's Singles professional tennis tournament, then the market resolves to Yes.

Consequent (then it means this happened or will happen)

KXATPGRANDSLAM-26-FTIA

Will Frances Tiafoe win a Tennis Grand Slam in 2026?

Series: KXATPGRANDSLAM
Entity: Frances Tiafoe
Expiration: 2026-12-31T15:00:00Z
Volume: 703

YES ask: 0.0200
NO ask: 0.9900
Last: 0.0100

View on Kalshi

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.

LLM Screening

Confidence: high
Model: claude-sonnet-5
Screened: 2026-07-12T08:03:07Z
Code version: N/A

Reasoning: US Open victory logically implies a Grand Slam victory.

Strategy: Buy NO on antecedent + YES on consequent
Est. yield (after fees): -11.89% (negative yield)
Cost: $1.0200 + ~$0.0014 est. fees
Days to maturity: 61
Hurdle yield: 4.32%
Excess yield: -16.21% BELOW HURDLE

Human Review

Decision: confirmed
Reviewed at: 2026-07-12T12:36:01Z

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