Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
80% | 20% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
80% | 20% | 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 → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| <900m | 80% |
| 900 - 920m | 16% |
| 920 - 940m | 2% |
| 940 - 960m | 1% |
| 1080m+ | 1% |
| 960 - 980m | 0% |
| 980 - 1000m | 0% |
| 1000 - 1020m | 0% |
| 1020 - 1040m | 0% |
| 1040 - 1060m | 0% |
| 1060 - 1080m | 0% |
Market context
Sony's Spider-Man: Brand New Day opens domestically on 31 July 2026, with the market settling on cumulative domestic box office through 31 August—a 32-day window capturing opening weekend through the end of summer. The crowd implies 80% confidence that the film will exceed the higher strike threshold, suggesting consensus expects a robust performance in the franchise's core market.
Recent Spider-Man theatrical releases provide the most relevant benchmarks. Spider-Man: No Way Home (2021) grossed $804m domestically, whilst Spider-Man: Across the Spider-Verse (2023) reached $690m. However, those figures represent full theatrical runs, not single-month windows. A month-long domestic haul typically captures 60–75% of total domestic gross for major tentpoles, depending on legs and competition. The 80% probability reflects confidence in strong opening momentum and sustained summer performance, though the settlement window's brevity means late-August competition and potential audience fatigue become material factors.
Key variables include Marvel Cinematic Universe scheduling—any concurrent MCU releases would fragment the superhero audience—and the film's critical reception, which drives word-of-mouth and repeat viewings. Summer 2026 blockbuster competition remains unconfirmed, but historical patterns show August typically experiences softer weekends as audiences shift toward back-to-school spending. The crowd's heavy favouring suggests traders expect Brand New Day to maintain strong per-screen averages through month-end, though the absence of confirmed supporting releases and the market's reliance on The Numbers' final data (not studio estimates) introduces settlement timing risk.
Methodology
We track "Spider-Man: Brand New Day" total domestic gross by August 31? (Higher Strikes) across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
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 Who Will Win. 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%.
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