Beijing Ducks vs. Shanghai Sharks

Platform comparison

Market context

Beijing and Shanghai are due to meet again in the CBA play-offs, with the market still pricing a Beijing win at 0% and therefore implying the Sharks are the only realistic side in the contract. That sits awkwardly beside the live and match-result evidence from the series: the teams have already traded wins, Shanghai took Game 3 by 81-66 on 20 May, and the head-to-head has been close enough across the season to keep the contest live rather than one-sided. Recent scoring lines from the same matchup have ranged from 66-81 to 99-88, which supports a higher-variance profile than the market’s current binary pricing suggests. Cross-platform, listed odds and analyst previews have generally leaned towards Shanghai, but not by a margin that would normally justify a literal zero on Beijing.

The main catalysts are straightforward: final team news, whether the fixture goes ahead on schedule, and any late injury or rotation updates from either bench. Sofascore and Flashscore both list the next Beijing-Shanghai game for 22 May, while YouTube live coverage of the series has already noted that it was level at one game apiece before Shanghai’s latest win, underscoring that the result is still dependent on the remaining play-off schedule rather than a settled series. Traders should watch for confirmation from CBA and team channels on venue, tip-off time and availability, especially if there are any delays or rescheduling. If the match is postponed rather than cancelled, the contract stays open until played; only an outright cancellation would force the 50-50 fallback.

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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.