Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Completed Match | 100% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 2 O/U 8.5 | 100% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 2 O/U 9.5 | 100% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set Handicap +/-1.5 | 100% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Game Spread +/-3.5 | 100% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 1 Winner | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 2 Winner | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 1 O/U 8.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Total Sets: O/U 2.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Match O/U 21.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 1 O/U 9.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set Handicap +/-1.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Match O/U 22.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Match O/U 23.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 2 O/U 10.5 | 0% |
| US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant Set 1 O/U 10.5 | 0% |
Market context
Savannah Broadus and Tyra Caterina Grant met in US Open women’s qualifying on hard courts in New York, with Grant the higher-ranked player and Broadus entering as a wild card into the draw.[2][7][9] Pre-match listings put Grant around WTA No. 153 and Broadus around No. 304-307, a ranking gap that generally favours the more established player in a best-of-three qualifying match.[1][2][6]
That makes the current 0% YES reading look more like a stale or mispriced line than a live assessment of the matchup itself, especially because comparable Grand Slam qualifying ties are usually driven by rankings, recent form and whether the lower-ranked player has home-draw or wildcard support.[2][7][9] In other words, the market is leaning on the expectation that the stronger-seeded qualifier should progress rather than on any broader tournament narrative.
The main catalyst for traders is the match result itself: official draw listings and score services showed the fixture scheduled for 24 August at 18:30 UTC on Court 7, and a later match report listed Grant beating Broadus 6-2, 6-4.[1][3][13] If that result is already final, the only live dependency is whether the market has been settled; if not, the key watchpoint is whether any official correction, abandonment or cancellation changes the outcome before the settlement window closes.[3][9]
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for US Open, Qualification WTA: Savannah Broadus vs Tyra Caterina Grant plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
UK Frequently Asked Questions
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- Why do Polymarket and Kalshi differ on elections?
- Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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