Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
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 expanded by 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 marking the weakest quarterly growth since late 2022 [1][3]. This real-world outcome directly contradicts the current 0% crowd-implied probability on Polymarket for a “YES” resolution, which would require GDP growth to exceed the market’s upper bracket—likely 5% or higher given the contract’s structure. The contract, settled in USDC on Polygon via conditional tokens, now faces immediate mispricing as the official data confirms growth well below any plausible high-range threshold.
Historically, China’s Q2 GDP has rarely breached 5% in recent years, with 2024 and 2025 both landing between 4.8–5.1% before the 2026 slowdown [2]. The 4.3% figure aligns with Reuters’ earlier forecast of a dip to 4.6% for the full year, driven by weak domestic demand and the Iran war-related oil shock that hampered production costs [2]. Traders on polymarket.za.com should note that past Q2 releases have consistently resolved to the lower brackets when growth fell below 4.8%, reinforcing the likelihood of a “NO” outcome.
Key catalysts now include the preliminary accounting results’ full release and any subsequent commentary from the National Bureau of Statistics on H2 outlook risks [3]. While Goldman Sachs previously projected 4.8% growth for 2026 amid surging exports, the actual Q2 data has already invalidated that bullish scenario [4]. With settlement ending 16 July 2026, the market’s 0% YES probability appears justified by the official 4.3% print, leaving little room for bracket escalation unless the final accounting adjusts significantly upward—a rare occurrence.
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
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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 PolyGram
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