Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Robinhood Prediction Markets) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| ↑ $85 | 100% |
| ↓ $80 | 28% |
| ↑ $90 | 21% |
| ↑ $95 | 6% |
| ↓ $75 | 2% |
| ↑ $115 | 1% |
| ↑ $110 | 1% |
| ↑ $105 | 1% |
| ↑ $100 | 1% |
| ↓ $70 | 1% |
| ↓ $65 | 1% |
| ↓ $60 | 1% |
| ↓ $55 | 1% |
| ↓ $50 | 0% |
Market context
WTI crude oil's price trajectory in mid-August 2026 will hinge on global supply disruptions, demand signals from China and the US, and geopolitical flashpoints in the Middle East and Russia. The current 1% implied probability reflects the market's assessment that WTI is unlikely to hit a specific threshold during that week—though the exact target price is not disclosed in the settlement terms provided. Across platforms, this low probability translates differently: Polymarket's fractional shares and Kalshi's binary contracts both express it as near-certain rejection, whilst Betfair's decimal odds would render the lay side heavily favoured. KYC requirements vary sharply; Kalshi enforces strict US residency checks, whereas Smarkets permits broader international participation, potentially fragmenting liquidity on identical underlying events.
Historical precedent suggests crude volatility clusters around OPEC+ production decisions and US inventory releases. In comparable periods, WTI has swung 5–8% within a single week when unexpected supply news emerged. The week of 17 August 2026 carries no scheduled OPEC meeting, but traders should monitor late-July production data from Iraq and Nigeria, any escalation in the Red Sea shipping corridor, and US Federal Reserve communications that might signal demand weakness. Reuters and Bloomberg terminals will carry real-time inventory figures each Wednesday; these often trigger sharp repricing.
Fee structures matter here: Polymarket charges 2% on withdrawals, Kalshi takes 2% on both sides, whilst Betfair's commission scales with volume. On a 1% probability market, the cost of entry can exceed expected value for small positions, making platform selection material to profitability.
Methodology
This page compares What will WTI Crude Oil (WTI) hit Week of August 17 2026? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.
FAQ
- Which platform has the deepest liquidity?
- Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.
- Is Betfair a Polymarket alternative?
- Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.
- What about Smarkets as an alternative?
- Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.
- Which platform is accessible globally?
- Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.
- Are all these platforms regulated?
- No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.
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