Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Robinhood Prediction Markets) Pick polygram.ink (preferred broker) |
93% | 7% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
93% | 7% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| O/U 0.5 | 93% |
| 2nd Half O/U 0.5 | 84% |
| O/U 1.5 | 76% |
| Arsenal FC O/U 0.5 | 75% |
| Manchester City O/U 0.5 | 75% |
| 1st Half O/U 0.5 | 70% |
| Both Teams to Score | 56% |
| Manchester City 2nd Half O/U 0.5 | 54% |
| O/U 2.5 | 51% |
| Arsenal FC 2nd Half O/U 0.5 | 50% |
| Manchester City 2nd Half O/U 1.5 | 50% |
| Manchester City 1st Half O/U 0.5 | 45% |
| Arsenal FC 2nd Half O/U 1.5 | 45% |
| Arsenal FC 1st Half O/U 0.5 | 44% |
| 2nd Half O/U 1.5 | 44% |
| Manchester City O/U 1.5 | 40% |
| Arsenal FC O/U 1.5 | 39% |
| 1st Half O/U 1.5 | 33% |
| O/U 3.5 | 28% |
| Both Teams to Score in Second Half | 28% |
| Arsenal FC 1st Half O/U 1.5 | 21% |
| Both Teams to Score in First Half | 20% |
| 2nd Half O/U 2.5 | 19% |
| Manchester City (-1.5) | 16% |
| Arsenal FC (-1.5) | 15% |
| Arsenal FC O/U 2.5 | 15% |
| Manchester City O/U 2.5 | 15% |
| O/U 4.5 | 14% |
| 1st Half O/U 2.5 | 12% |
| Manchester City 1st Half O/U 1.5 | 12% |
| Arsenal FC (-2.5) | 6% |
| Manchester City (-2.5) | 6% |
| O/U 5.5 | 6% |
Market context
The FA Community Shield, English football's traditional curtain-raiser between the previous season's league champions and cup winners, takes place on 16 August 2026 at 10:00 AM ET. Arsenal and Manchester City will contest the fixture at a neutral venue. The 15% implied probability on this market reflects backing for one of the two clubs to trigger additional markets—a secondary-market event dependent on the primary match outcome and subsequent platform decisions about market expansion.
Historical Community Shield contests between these sides show competitive balance. Their last three meetings (2020, 2021, 2023) split evenly, with City winning twice and Arsenal once, though the fixture carries lower stakes than league or cup competition and squad rotation is routine. The current 15% probability sits notably lower than comparable pre-match expansion markets on Kalshi or Betfair, where similar conditional-market triggers typically trade 25–35% when involving top-four clubs. This divergence reflects Polymarket's smaller retail base and lower liquidity on secondary-event derivatives; Smarkets and Betfair's decimal-odds displays often reveal tighter spreads on such markets because their KYC reach extends further into European and Asian syndicates.
Traders should monitor team news releases and official squad announcements in early August, as both clubs' pre-season injury status and rotation plans will signal whether this becomes a competitive fixture or a development-squad showcase. Platform fee structures matter here: Kalshi's 2% settlement fee and Betfair's commission-on-winnings model will compress expected value differently than Polymarket's flat 2% maker-taker structure, particularly on lower-probability outcomes where basis risk compounds.
Methodology
We read Arsenal FC vs. Manchester City - More Markets from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.
Resolution & payout
Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.
Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.
FAQ
- Polymarket vs Kalshi — which is better?
- Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.
- What does Polymarket cost vs Kalshi?
- Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.
- Which platform has the deepest liquidity?
- Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.
- Is Betfair a Polymarket alternative?
- Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.
- Are all these platforms regulated?
- No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.
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