Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| ↑ 2,500 | 100% |
| ↑ 2,450 | 100% |
| ↑ 2,400 | 100% |
| ↑ 2,350 | 100% |
| ↑ 2,550 | 23% |
| ↑ 2,650 | 6% |
| ↑ 2,600 | 5% |
| ↓ 2,300 | 1% |
| ↓ 2,250 | 0% |
| ↓ 2,200 | 0% |
| ↓ 2,150 | 0% |
| ↓ 2,100 | 0% |
| ↓ 2,050 | 0% |
| ↓ 2,000 | 0% |
Market context
Ethereum has swung sharply in the run-up to the 21 August close, with prices reported around $2,371 on the morning of 21 August after trading nearer $1,900 earlier in the week. That leaves the market leaning towards a move above recent resistance, but the 6% YES price still implies traders see a much steeper threshold event than the current spot range suggests. [6][13]
The recent tape is best read against a year of volatile, mostly weaker ETH performance: one February report put ether near $1,800 and down 38% year to date, underlining how far sentiment had fallen before the August rebound. More recent coverage described a 19-20 August surge of as much as 18-23% in 24 hours, with ETH pushing from below $1,950 towards the $2,300 area and testing $2,400 resistance, while another report said the rally was driven by spot ETF demand, short liquidations and a break above key technical levels. [2][3][12]
For the final stretch, traders are watching whether the move holds after the short squeeze and whether fresh ETF flows, broader crypto strength and any policy or regulatory headlines keep momentum alive. Coverage on 20 August linked the jump to push for clarity legislation in the US, while other market notes flagged concentrated leverage and liquidation risk on DeFi platforms, so sudden reversals remain a live dependency into the settlement window ending 04:00 UTC on 22 August. [13][5][12]
Methodology
Sports-specific comparison page for What price will Ethereum hit on August 21?. 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.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- 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.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
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