Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets) 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 → |
Market context
Ethereum is trading close to the level that will decide the contract, with spot prints around the mid-$1,700s to $1,800s across recent data, while the market is pricing an 81% chance of **Up**. That looks materially more bullish than some external reference lines: Robinhood’s ETH event for the same date implied 79¢ for $1,850 or above, while several forecast sites cluster around modestly positive August outcomes rather than a dramatic move. [2][6][20]
For context, Ethereum’s recent path has been choppy rather than trending cleanly, which makes a one-day noon-to-noon comparison sensitive to intraday swings. One recent snapshot put ETH at $1,844.64 at 7 a.m. ET, down $21.29 on the morning and far below its level a year earlier, while other market trackers showed ETH around $1,739 with a previous close of $1,789.47 and a 12-month decline of 37.18%. In other words, the current 81% YES price sits above the more cautious tone of recent spot performance, but it is not wildly detached from the idea that small mean-reversion moves could be enough to settle the market **Up** if ETH simply holds or edges higher into the closing candle. [1][2][8]
The main catalysts are the usual crypto drivers: broader risk appetite, Bitcoin-led moves, and any surprise in Ethereum-specific network or regulatory headlines before the settlement window closes. Near-dated prediction-market and analyst snapshots suggest traders are still treating August as a range-bound month rather than a breakout phase, so a sharp move in either direction would likely need a macro shock, a large market-wide liquidation, or a fresh catalyst in spot ETF flow expectations or protocol news. [11][14][18]
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets, which mirrors the Polymarket order book directly.
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
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
Trade Ethereum Up or Down on August 3? on Best Prediction Markets
Live order book, 0% fees, USDC settlement in seconds.
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