Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
89% | 11% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
89% | 11% | 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 |
|---|---|
| O/U 0.5 Rounds | 89% |
| O/U 1.5 Rounds | 84% |
| O/U 2.5 Rounds | 72% |
| O/U 3.5 Rounds | 66% |
| Mackenzie Dern vs. Gillian Robertson | 65% |
| O/U 4.5 Rounds | 59% |
| Fight to Go the Distance? | 58% |
| Fight won by submission? | 38% |
| Fight won by KO/TKO? | 27% |
| Dern to win by KO/TKO? | 8% |
| Robertson to win by KO/TKO? | 7% |
Market context
Mackenzie Dern faces Gillian Robertson in a women's strawweight bout on the UFC 330 main card in August 2026. Dern, the former title challenger and two-time UFC gold medalist in the division, enters as the favoured fighter at 65% implied probability. Robertson, a veteran with notable wins over top-ten contenders, represents a credible test for Dern's return to form after recent inconsistency at welterweight.
Dern's record at strawweight prior to her welterweight experiment showed a 6–2 mark with losses to Rose Namajunas and Tatiana Suarez—both elite strikers who exposed her wrestling-dependent approach. Robertson's recent form includes a split decision loss to Marina Rodriguez in 2024 and a submission victory over Rowe in early 2025, suggesting she remains competitive but not dominant. The 65% probability reflects Dern's technical grappling advantage and prior ranking status, though Robertson's experience in five-round fights and improved striking defence merit consideration. Historical precedent suggests strawweight veterans with Dern's pedigree maintain an edge against Robertson's profile, though upsets occur in roughly 30–35% of comparable matchups.
Traders should monitor official UFC injury announcements and any coaching staff changes for either fighter, particularly whether Dern has retained her long-time grappling coaches. Weight-cut complications or late withdrawals would trigger a 50–50 resolution. The settlement window closes 16 August 2026, with a 14-day buffer for any post-event scoring disputes or technical reviews before final resolution.
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $87K.
Methodology
Sports-specific comparison page for UFC 330: Mackenzie Dern vs. Gillian Robertson (Women's Strawweight, Main Card). Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- 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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