Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Election Predictions UK) Pick polygram.ink (preferred broker) |
71% | 29% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
71% | 29% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 1st 5 Innings O/U 2.5 | 71% |
| O/U 6.5 | 63% |
| 1st 5 Innings O/U 3.5 | 56% |
| O/U 7.5 | 50% |
| NRFI | 46% |
| Colorado Rockies vs. San Francisco Giants | 45% |
| 1st 5 Innings O/U 4.5 | 45% |
| O/U 8.5 | 42% |
| Spread -1.5 | 37% |
| Spread -1.5 | 34% |
| 1st 5 Innings O/U 5.5 | 34% |
| 1st 5 Innings Spread -1.5 | 33% |
| Spread -2.5 | 27% |
| 1st 5 Innings Spread -1.5 | 26% |
| 1st 5 Innings O/U 6.5 | 25% |
| Spread -2.5 | 24% |
| Extra Innings | 9% |
Market context
The Colorado Rockies face the San Francisco Giants in an MLB regular-season matchup on 14 August at 10:15PM ET, with the settlement window extending to 22 August to accommodate any postponements. The current crowd-implied probability of 45% for a Rockies victory reflects modest confidence in the visiting team, despite Colorado's home-field disadvantage in this fixture.
Historical matchups between these franchises show competitive balance across recent seasons, though the Giants have maintained a slight edge in head-to-head records over the past three years. The Rockies' performance at Coors Field typically outpaces their road record, a factor that works against them here. San Francisco's pitching depth and defensive consistency have historically favoured them in August contests, when fatigue becomes a material variable. The current probability assessment suggests the market is pricing in the Giants' marginal advantages whilst acknowledging the inherent volatility of single-game outcomes.
Key variables for traders to monitor include confirmed starting pitchers, which typically influence betting markets substantially in the 48 hours before first pitch. Injury reports affecting either team's roster—particularly position players or bullpen availability—have historically shifted probabilities by 3–5 percentage points in comparable fixtures. Weather conditions at the Giants' stadium and any last-minute roster adjustments announced via MLB official channels should be tracked through standard sports news outlets. The extended settlement window suggests organisers anticipate potential scheduling complications, which traders should factor into their confidence assessments.
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $104K.
Methodology
This page tracks Colorado Rockies vs. San Francisco Giants across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
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.
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- 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 Election Predictions UK route into the same order book at 0% fees.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- 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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