Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
BTC Prediction Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on BTC Prediction → |
Polymarket polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on BTC Prediction → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on BTC Prediction → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on BTC Prediction → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on BTC Prediction → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on BTC Prediction.
Active sub-markets
| Hakeem Jeffries | 100% YES | 0% NO |
| Chi Ossé | 0% YES | 100% NO |
| Candidate C | — | |
| Candidate E | — | |
| Candidate G | — | |
| Candidate I | — | |
Market context
New York's 8th Congressional District, which encompasses parts of Brooklyn and Queens, will hold a Democratic primary election in 2026 to determine the party's nominee for the House seat. The district has been reliably Democratic in general elections, making the primary outcome effectively determinative of the eventual representative. The current 100% implied probability reflects the near-certainty that a Democratic primary will occur, given the district's electoral composition and the absence of any credible scenario in which the primary is cancelled or fails to materialise.
Historical precedent from New York's 8th District primaries shows competitive races when the incumbent is absent or vulnerable. The 2022 primary saw multiple candidates compete after redistricting altered the seat's boundaries, with Jerrold Nadler ultimately prevailing. Such multi-candidate contests typically feature significant spending and grassroots mobilisation, with outcomes often determined by turnout patterns and endorsement coalitions rather than polling alone. The 100% probability assigned here reflects confidence in the primary's occurrence rather than certainty about any specific candidate's victory.
Traders should monitor candidate announcements and filing deadlines, which typically occur in early 2026 under New York election law. The New York Democratic Party's official results announcement will serve as the settlement trigger. Key variables include whether the current representative seeks re-election, the size of the candidate field, and whether any high-profile endorsements emerge. Local Brooklyn and Queens media outlets will provide early signals of candidate activity and fundraising momentum as the primary season approaches.
Methodology
This page reads NY-08 Democratic Primary Winner on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed for comparison. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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
- Is this market available outside the US?
- BTC Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What does it cost to trade on BTC Prediction?
- Zero. BTC Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, BTC Prediction triggers a quick verification flow that finishes in minutes.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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