Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
50% | 50% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
50% | 50% | 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 |
|---|---|
| Candidate O | 50% |
| Candidate P | 50% |
| Candidate Q | 50% |
| Candidate R | 50% |
| Candidate S | 50% |
| Candidate T | 50% |
| Other | 50% |
| Maria Bartiromo | 27% |
| Anna Kelly | 14% |
| Scott Jennings | 13% |
| Alina Habba | 4% |
| Margo Martin | 4% |
| Margo Martin | 1% |
| Tricia McLaughlin | 1% |
| Natalie Harp | 1% |
| Ari Fleischer | 1% |
| Kush Desai | 0% |
| Taylor Rogers | 0% |
| Pat Adams | 0% |
| Lauren Bis | 0% |
| Liz Huston | 0% |
| Kaelan Dorr | 0% |
| Katie Pavlich | 0% |
| Hogan Gidley | 0% |
| Harrison Fields | 0% |
| Kayleigh McEnany | 0% |
| Kari Lake | 0% |
| Monica Crowley | 0% |
| Katie Zacharia | 0% |
| Katie Miller | 0% |
| Matthew Boyle | 0% |
| Spencer Pratt | 0% |
| Lara Trump | 0% |
| Rachel Campos-Duffy | 0% |
Market context
Who will Trump pick as the next Press Secretary?. The market is currently pricing the outcome at 1% YES, meaning crowd-implied probability sits at that level. Settlement is scheduled for 2026-12-31T23:59:00Z. Unlike a sportsbook, the price you see is set by buyers and sellers competing in a live order book — there is no house edge or bookmaker margin to fade.
World-affairs prediction markets price discrete geopolitical outcomes — ceasefires, treaty signings, leadership transitions — and tend to drift on rumour and snap-correct on official announcements.
Watch for the underlying catalysts that move this category: each official announcement, dataset release, or scheduled milestone generally produces a step change in the implied probability. Trades execute instantly on Polygon, and shares pay $1 each at resolution if your side wins.
Methodology
Sports-specific comparison page for Who will Trump pick as the next Press Secretary?. 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.
- 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.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- 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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