Beijing Ducks vs. Shanghai Sharks

Platform comparison

Market context

Beijing Ducks and Shanghai Sharks meet again in the CBA play-offs, and the market is pricing a 0% YES chance for Beijing despite the series already producing a split of outcomes. Shanghai have drawn support as the more reliable side after taking the latest game 99-88 on 20 May, following Beijing’s 88-82 win in the previous meeting. Recent head-to-head results also lean Shanghai: 86-67 on 20 January and 88-83 on 12 April, with Beijing’s best recent counter coming in a 87-82 result on 15 May. That leaves the consensus firmly with Shanghai, while any contrarian Beijing angle rests on the fact that the gap between the teams has not been uniform across the series.

For traders, the main catalysts are simple: whether the scheduled May 22 game goes ahead as planned, and whether either side rests or rotates differently in the short turnaround. Flashscore and Sofascore both list the fixture for 22 May, while YouTube live listings and recent match coverage indicate the play-off semi-final has been active and ongoing. The market only resolves on the final score, including overtime, so late line-up news, injury updates and any scheduling changes matter more than broader season form. With the implied probability at zero, the only value case is a sharp move away from Shanghai if Beijing can translate home-court leverage and tighter defensive output into a lower-scoring game than the recent 99-88 result.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Beijing Ducks vs. Shanghai Sharks across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

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 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.