Cardinals vs. Raiders

Platform comparison

Market context

The Arizona Cardinals and Las Vegas Raiders were scheduled to meet in Las Vegas on 13 August at 8:00pm ET, with the market set to resolve to the winning side unless the game is postponed, cancelled, or ends as a tie without a make-up, in which case it stays open or settles 50-50 under the contract rules. The current crowd-implied 53% YES sits close to the broader sportsbook picture, where the Raiders were priced as modest favourites and the Cardinals as live underdogs, suggesting a near coin-flip rather than a strong consensus. [2][5][3]

That shape is consistent with comparable pre-season pricing rather than a regular-season signal: books and market venues around the matchup had the Raiders around -155 to -174 on the moneyline and the Cardinals around +130 to +150, which maps to an implied Raiders win chance in the high-50s to low-60s before vig is stripped out. Kalshi’s published read was also 60% Raiders, while other previews clustered closer to the mid-50s, so a 53% market price broadly tracks the same range once transaction costs and late line drift are considered. [2][1][5][3]

For traders, the key catalysts are not team records but *event completion* and settlement mechanics: any delay, postponement, or abandonment can keep the contract open beyond kickoff until the game is finished, while a no-contest or tie pushes it to 50-50. In practice, that means the most important checks are official NFL status updates, any revised kick-off or completion schedule, and the final box score; if you are framing this through crypto market behaviour, the main on-chain angle is USDC settlement risk and liquidity rather than BTC or ETH beta, unless broader risk appetite is already moving sports-market pricing across venues. [2][1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Cardinals vs. Raiders on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

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

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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%.