Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 4.3-4.6% | 100% |
| <4.0% | 0% |
| 4.0-4.3% | 0% |
| 4.6-4.9% | 0% |
| 4.9-5.2% | 0% |
| 5.2-5.5% | 0% |
| 5.5-5.8% | 0% |
| 5.8-6.1% | 0% |
| 6.1%+ | 0% |
Market context
China’s economy grew 4.3% year-on-year in Q2 2026, officially released by the National Bureau of Statistics on 15 July, falling below the government’s 4.5–5% annual target and missing market forecasts due to weak domestic demand and an oil shock linked to the Iran war[1][2]. This Q2 figure marks the lowest quarterly growth since late 2022, underscoring a sharp slowdown despite a surge in exports and stronger production[1][3]. On Polymarket, the contract for “China GDP growth (Y/Y) in Q2 2026?” trades at 0% YES in USDC on Polygon, reflecting the crowd’s certainty that the reported value will not exceed the highest bracket defined in the market rules, given the confirmed 4.3% outcome[1].
Historically, such misses have triggered immediate repricing in conditional token markets, as traders pivot from growth bets to downside hedges once official data contradicts consensus. The 4.3% result aligns with Reuters’ 2026 forecast of 4.6% annual growth, but the quarterly dip signals deeper structural fragility, with domestic consumption lagging while exports remain resilient[2]. Traders should monitor upcoming announcements from the People’s Bank of China on monetary policy, the National Development and Reform Commission’s H2 stimulus plans, and any shifts in oil prices tied to Middle East tensions, as these will shape the second-half trajectory[2]. Goldman Sachs still projects 4.8% real GDP growth for 2026, but the Q2 miss suggests that upside may be harder to achieve without fresh policy support[4].
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
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
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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'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.
- 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.
- 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 China GDP growth (Y/Y) in Q2 2026? on Kalshi UK
Live order book, 0% fees, USDC settlement in seconds.
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