Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on PolyGram → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on PolyGram → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on PolyGram → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on PolyGram → |
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 PolyGram.
Active sub-markets
| Connecticut Sun vs. Seattle Storm | 0% YES | 100% NO |
| Spread -2.5 | 100% YES | 0% NO |
| O/U 167.5 | 0% YES | 100% NO |
| O/U 166.5 | 0% YES | 100% NO |
| Spread -3.5 | 100% YES | 0% NO |
| Spread -1.5 | 100% YES | 0% NO |
Market context
The Connecticut Sun travel to Seattle for a regular-season WNBA matchup on 22 May at 10:00 PM ET. The settlement window closes at 02:00 UTC on 23 May, allowing roughly four hours post-game for final resolution. The 0% implied probability currently displayed on this prediction market represents an extreme outlier against conventional sportsbook pricing, where Seattle typically opens as a modest favourite in home fixtures. This divergence warrants scrutiny, as prediction markets and traditional bookmakers rarely align so dramatically on established professional sports events with clear historical records and transparent scheduling.
Connecticut's roster composition and recent form against Seattle's defensive schemes provide the substantive backdrop for assessing whether the current pricing reflects genuine analytical consensus or market dysfunction. The Sun have competed competitively in recent seasons, whilst Seattle's home-court advantage at Climate Pledge Arena carries measurable statistical weight in WNBA outcomes. Comparable regular-season matchups between these franchises typically settle with implied probabilities ranging from 35% to 55% for the visiting team, depending on injury status and seasonal trajectory. The present 0% reading sits far outside historical norms for non-cancelled games.
Traders should monitor official roster announcements through 22 May, particularly regarding key player availability or late-breaking injuries that sportsbooks incorporate into live-betting adjustments. The WNBA's official schedule and team injury reports, updated regularly on wnba.com, remain the primary information sources. Any postponement triggers the market's open-until-completion clause, whilst outright cancellation without rescheduling would force a 50-50 resolution. The extreme probability gap between this market and standard bookmaker lines suggests either significant information asymmetry or technical factors worth investigating before committing capital.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- Where can I trade this market with the lowest fees?
- On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- Is this market available outside the US?
- PolyGram 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 PolyGram?
- Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- 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.
Trade Connecticut Sun vs. Seattle Storm on PolyGram
Live order book, 0% fees, USDC settlement in seconds.
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