Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Completed Match | 100% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Game Spread +/-4.5 | 100% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 2 O/U 8.5 | 100% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set Handicap +/-1.5 | 100% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 2 Winner | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 1 Winner | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Total Sets: O/U 2.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 1 O/U 8.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Match O/U 21.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 2 O/U 9.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Match O/U 22.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 1 O/U 9.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Match O/U 23.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 2 O/U 10.5 | 0% |
| US Open, Qualification WTA: Ayla Aksu vs Lucrezia Stefanini Set 1 O/U 10.5 | 0% |
Market context
Market consensus: 100% chance of us open, qualification wta: ayla aksu vs lucrezia stefanini. Prediction markets aggregate real capital to produce this probability signal. This market refers to the tennis match between Ayla Aksu and Lucrezia Stefanini in the US Open, Qualification WTA, originally scheduled for August 24, 2026 at 12:30PM ET. This mar…
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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
UK Frequently Asked Questions
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- What are the best prediction markets for UK traders in 2026?
- For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.
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