WTI Crude Oil (WTI) closes above … on August 5?

Platform comparison

Market context

WTI crude is trading lower than it was a few days ago, with recent reporting pointing to a slide into the mid-$70s as easing Middle East supply fears and hopes of a gradual resumption of shipping through the Strait of Hormuz softened the market. That move matters for this market because the settlement is based on the front-month WTI contract, so the close on the day will reflect the final cash reading rather than intraday spikes.[6][5]

For context, WTI has been extremely sensitive to geopolitics and supply-flow headlines this summer, and the recent drop follows a sharp earlier run-up that left prices well above the levels implied by the current market. Comparable sessions have shown that a single-day move of 1% to 3% can materially change the settlement outcome when prices are sitting close to a strike level, which is why a 0% YES probability is only consistent if traders expect the contract to finish well below the threshold.[8][18][11]

The main catalysts to watch are any further Strait of Hormuz developments, fresh OPEC+ commentary, and US inventory data, all of which can shift prompt crude pricing quickly. The ICE settlement convention and the front-month roll also matter here, because this market resolves off the nearest listed contract month and the final settlement print, not a broad spot average.[5][16]

Sources: 1 · 2 · 3 · 4 · 5

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.

UK Frequently Asked Questions

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 Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.