Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) 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% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 2 O/U 8.5 | 100% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 1 O/U 8.5 | 100% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 2 O/U 9.5 | 100% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set Handicap +/-1.5 | 100% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 2 Winner | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Total Sets: O/U 2.5 | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 1 Winner | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Match O/U 21.5 | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set Handicap +/-1.5 | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 1 O/U 9.5 | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Match O/U 22.5 | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 2 O/U 10.5 | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Set 1 O/U 10.5 | 0% |
| Cincinnati Open, Qualification: Aoi Ito vs Harriet Dart Match O/U 23.5 | 0% |
Market context
The Cincinnati Open qualifying draw takes shape this week, with Aoi Ito facing Harriet Dart in what would be a first-round encounter on 12 August. The 0% probability assigned suggests either incomplete market participation or a technical issue, as both players have legitimate paths through qualifying. Ito, ranked around 180–200 on the WTA, has shown variable form on hard courts; Dart, hovering near 150, brings more consistent qualifying experience. Neither player has withdrawn or reported injury as of the latest tour updates.
Comparable qualifying matchups at Cincinnati historically favour the higher-ranked player roughly 65–70% of the time, though upsets cluster around players with recent tournament momentum. Dart's record in hard-court qualifying rounds sits marginally above Ito's over the past eighteen months, though sample sizes remain modest. The 0% reading contradicts standard market-making practice for matches between players of similar ranking and recent form, suggesting either liquidity constraints or a data lag in probability aggregation.
The settlement window closes 19 August, allowing a full week beyond the scheduled date for completion or rescheduling. Traders should monitor the official Cincinnati draw confirmation and any late withdrawals through the WTA website; qualifying draws occasionally shift when higher-ranked players enter the main draw or withdraw. Weather delays are possible given Cincinnati's August schedule, though the venue typically accommodates rescheduling within the window. Court assignments and match order will clarify competitive context once the draw is finalised.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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