Cincinnati Reds vs. Philadelphia Phillies

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Active sub-markets

Market context

The Cincinnati Reds and Philadelphia Phillies are due to meet again on 20 May in Philadelphia, with the market asking who wins the game outright. The 100% YES crowd price is consistent with the Phillies having just beaten Cincinnati 5-4 on Monday night, extending their winning run to five, before the Reds responded with a 4-1 win in the rematch. For a programmatic read, that means the market is not pricing a neutral coin flip; it is effectively treating Philadelphia as the default side unless late information materially changes the setup. In comparable MLB head-to-head markets, that kind of saturation usually reflects either a clear edge in the pre-game data or a late-stage trading imbalance rather than certainty about the result.

For traders running bots, conditional orders or cross-market checks, the key inputs are the confirmed line-ups, starting pitchers and any weather or schedule changes before first pitch. ESPN reported the previous Phillies win and highlighted Bryson Stott’s late home run and Jhoan Duran’s save, while recent coverage of the second game noted Chase Burns leading Cincinnati to a 4-1 victory, showing how quickly the matchup has swung on pitching and sequencing. The practical approach is to watch for official line-up cards and any last-minute scratch, then compare the live price against the pre-match close; because the market only resolves on the completed game, postponement or cancellation risk remains relevant until the final result is official.

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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.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.