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 |
|---|---|
| O/U 0.5 | 100% |
| O/U 1.5 | 100% |
| O/U 2.5 | 100% |
| Both Teams to Score | 100% |
| 1st Half O/U 0.5 | 100% |
| CSyD Defensa y Justicia O/U 0.5 | 100% |
| CSyD Defensa y Justicia O/U 1.5 | 100% |
| CA Newell's Old Boys O/U 0.5 | 100% |
| CSyD Defensa y Justicia 1st Half O/U 0.5 | 100% |
| Both Teams to Score in Second Half | 100% |
| 2nd Half O/U 0.5 | 100% |
| 2nd Half O/U 1.5 | 100% |
| CSyD Defensa y Justicia 2nd Half O/U 0.5 | 100% |
| CA Newell's Old Boys 2nd Half O/U 0.5 | 100% |
| CSyD Defensa y Justicia (-1.5) | 0% |
| CA Newell's Old Boys (-1.5) | 0% |
| CSyD Defensa y Justicia (-2.5) | 0% |
| CA Newell's Old Boys (-2.5) | 0% |
| O/U 3.5 | 0% |
| O/U 4.5 | 0% |
| O/U 5.5 | 0% |
| Both Teams to Score in First Half | 0% |
| 1st Half O/U 1.5 | 0% |
| 1st Half O/U 2.5 | 0% |
| CSyD Defensa y Justicia O/U 2.5 | 0% |
| CA Newell's Old Boys O/U 1.5 | 0% |
| CA Newell's Old Boys O/U 2.5 | 0% |
| CSyD Defensa y Justicia 1st Half O/U 1.5 | 0% |
| CA Newell's Old Boys 1st Half O/U 0.5 | 0% |
| CA Newell's Old Boys 1st Half O/U 1.5 | 0% |
| 2nd Half O/U 2.5 | 0% |
| CSyD Defensa y Justicia 2nd Half O/U 1.5 | 0% |
| CA Newell's Old Boys 2nd Half O/U 1.5 | 0% |
Market context
Defensa y Justicia v Newell’s Old Boys was scheduled for 20:45 UTC on 9 August at Estadio Norberto Tomaghello, and the market’s 0% YES price sits awkwardly against pre-match previews that still had the fixture live and awaiting line-ups. The last 24-48 hours mattered because the trading window was effectively driven by team news timing, with projected starting XIs only expected about an hour before kick-off, leaving little time for late repricing once confirmations arrived.[2][5]
The historical frame is mixed rather than one-sided. Defensa have generally had the better of the head-to-head, with recent previews citing 9 wins in 17 meetings and 11 wins in 19, but Newell’s did take the most recent meeting 3-2 away earlier this year according to one preview, while another noted a 1-1 draw in the latest home fixture. That pattern is the main reason a zero-probability market needs caution: the fixture has produced both tight draws and narrow wins, so a missed lineup detail or late tactical shift can matter more than the raw H2H record suggests.[3][13]
For today’s outlook, traders should watch the confirmed line-ups, any late injury or rotation news, and whether either side is preserving a standard first XI after recent league fixtures. Newell’s arrived off a 2-2 draw with Boca Juniors and Defensa off a 3-0 defeat to Estudiantes, so any change in attacking personnel or midfield structure would be the clearest catalyst for a move in side, totals, or both-teams-to-score sub-markets.[1][11]
Methodology
This page reviews CSyD Defensa y Justicia vs. CA Newell's Old Boys - More Markets across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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.
- 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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