Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
16% | 84% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
16% | 84% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| ↓ 1,900 | 16% |
| ↑ 1,950 | 2% |
| ↑ 2,050 | 1% |
| ↓ 1,850 | 1% |
| ↓ 1,800 | 1% |
| ↑ 2,250 | 0% |
| ↑ 2,200 | 0% |
| ↑ 2,150 | 0% |
| ↑ 2,100 | 0% |
| ↑ 2,000 | 0% |
| ↓ 1,750 | 0% |
| ↓ 1,700 | 0% |
| ↓ 1,650 | 0% |
| ↓ 1,600 | 0% |
Market context
Ethereum was trading around **$1,915–$1,920** on 9 August 2026, so a market asking whether it will “hit” a given price on that date is really pricing a one-day move against a fairly tight spot range rather than a fresh trend break.[1][2][3] The crowd-implied **0% YES** suggests the contract is being treated as effectively out of the money, which is consistent with ETH spending the day clustered near its recent tape rather than making a decisive impulse higher.[1][3][9] On-chain and venue data also point to a market that is still digesting the previous week’s advance, with only modest daily change and no sign in the cited data of a disorderly blow-off move.[2][3]
Comparable readings matter because ETH has been trading in a band where small differences in exchange prints can decide a binary settlement, especially for USDC-settled contracts that usually reference a specific spot price at the fixing time. Recent market snapshots show ETH near **$1,914.48** on Investing.com and **$1,918.90** on MetaMask, while historical Binance-linked data for 9 August shows a close around **$1.92K** with a narrow intraday range.[1][2][9] That kind of dispersion is normal across venues, but it means traders should focus on the settlement source and the exact timestamp rather than headline “ETH price” levels when reading the probability.
The main catalysts are the same ones that can push ETH through a short-dated strike: BTC direction, derivatives positioning, and any shift in spot liquidity or whale flows. CoinStats noted ETF inflows and institutional yield strategies as support, while also flagging a contentious staking-policy debate that could alter sentiment if it escalates.[3] In practice, traders will watch exchange spot momentum, perpetual funding rates, and whether large transfers to or from exchanges coincide with BTC volatility, because those flows can quickly widen the gap between a stable mid-price and the contract’s hurdle level.[3]
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
UK Frequently Asked Questions
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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