Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) 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% |
| 1st Half O/U 0.5 | 100% |
| 1st Half O/U 1.5 | 100% |
| St. Louis City SC O/U 1.5 | 100% |
| St. Louis City SC 1st Half O/U 0.5 | 100% |
| St. Louis City SC 1st Half O/U 1.5 | 100% |
| Both Teams to Score | 99% |
| San Jose Earthquakes O/U 0.5 | 99% |
| 2nd Half O/U 0.5 | 99% |
| San Jose Earthquakes 2nd Half O/U 0.5 | 99% |
| St. Louis City SC O/U 0.5 | 98% |
| O/U 3.5 | 86% |
| San Jose Earthquakes O/U 1.5 | 67% |
| St. Louis City SC O/U 2.5 | 55% |
| O/U 4.5 | 54% |
| Both Teams to Score in Second Half | 51% |
| San Jose Earthquakes O/U 2.5 | 50% |
| 2nd Half O/U 1.5 | 50% |
| 2nd Half O/U 2.5 | 50% |
| San Jose Earthquakes 2nd Half O/U 1.5 | 50% |
| St. Louis City SC 2nd Half O/U 0.5 | 50% |
| St. Louis City SC 2nd Half O/U 1.5 | 50% |
| St. Louis City SC (-1.5) | 28% |
| O/U 5.5 | 26% |
| San Jose Earthquakes (-1.5) | 13% |
| St. Louis City SC (-2.5) | 8% |
| San Jose Earthquakes (-2.5) | 2% |
| Both Teams to Score in First Half | 0% |
| 1st Half O/U 2.5 | 0% |
| San Jose Earthquakes 1st Half O/U 0.5 | 0% |
| San Jose Earthquakes 1st Half O/U 1.5 | 0% |
Market context
San Jose Earthquakes will face St. Louis City SC in an MLS regular-season match on 15 August at 22:30 ET. The market currently prices the likelihood of additional markets being offered for this fixture at 13%, suggesting traders view supplementary betting options as unlikely to materialise before the settlement window closes on 16 August at 02:30 UTC.
MLS fixture coverage on prediction markets has historically been sparse outside major tournaments and playoff contests. Regular-season matches between mid-table sides rarely generate sufficient trader interest to justify secondary market creation. The Earthquakes and City SC occupy mid-table positions in the Western and Eastern Conferences respectively, reducing the probability that sportsbooks or prediction platforms will develop ancillary markets around their encounter. Comparable fixtures from the 2024 season show that only matches involving top-seeded teams or playoff-bound clubs typically spawn multiple betting options beyond standard match outcomes.
The critical catalyst remains the scheduling decisions of major prediction-market operators and sportsbooks in the hours immediately preceding kick-off. Platforms typically announce additional markets 24 to 48 hours before fixture start times if demand signals warrant the operational overhead. No recent announcements from ESPN, FanDuel, or DraftKings indicate plans for expanded coverage of this particular match. The tight settlement window—closing fewer than four hours after the final whistle—further constrains the window for market creation, as operators generally require sufficient trading volume to justify platform resources.
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for San Jose Earthquakes vs. St. Louis City SC - More Markets plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.
Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.
UK Frequently Asked Questions
- How accurate are political prediction markets?
- Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Why do Polymarket and Kalshi differ on elections?
- Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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