Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Targu Mures: Laura Samson vs Mia Ristic | 100% |
| Completed Match | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Set 1 Winner | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Set 1 O/U 8.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Total Sets: O/U 2.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Set 2 O/U 8.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Match O/U 21.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Set 1 O/U 9.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Match O/U 22.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Set 2 O/U 9.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Set 1 O/U 10.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Match O/U 23.5 | 100% |
| Targu Mures: Laura Samson vs Mia Ristic Set 2 Winner | 0% |
| Targu Mures: Laura Samson vs Mia Ristic Set Handicap +/-1.5 | 0% |
| Targu Mures: Laura Samson vs Mia Ristic Set Handicap +/-1.5 | 0% |
| Targu Mures: Laura Samson vs Mia Ristic Set 2 O/U 10.5 | 0% |
Market context
Laura Samson and Mia Ristic are meeting in the Târgu Mureş WTA 125 quarter-finals on clay, with the WTA and live-score boards both listing the contest for 31 July and the official tournament page showing the fixture at this stage of the draw.[12][7] The market’s 100% YES pricing points to a near-certain completed match outcome rather than a suspension scenario, but the contract still settles to 50-50 if the tie is not played, is left without a winner, or runs past the seven-day delay window without a result.
The current frame is not a simple ranking-gap trade. Samson is listed around WTA 153 and Ristic around WTA 224, while pre-match odds on one sportsbook had Samson favoured but not overwhelmingly so, with Ristic trading as a live underdog and the total games line implying a competitive clay match.[4][14] Historical context is thin: the pair have a prior head-to-head on clay, won by Ristic in straight sets in 2023, which gives traders at least one comparable result, but not enough to treat either player as structurally dominant.[8][2]
For settlement risk, the main catalysts are straightforward: confirmation that the quarter-final starts on schedule, any last-minute retirement or withdrawal, and whether the tournament timetable on Court 3 holds up as earlier rounds clear.[7][12] On-chain, the relevant point is that resolution pays out in USDC once the oracle reports the tennis result, so the position is most sensitive to officiated completion rather than intraday BTC or ETH moves; those macro flows matter more for market liquidity and available bankroll than for the binary outcome itself.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- Why USDC and not ETH or USDT?
- USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
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