LoL: Movistar KOI vs GIANTX (BO3) - LEC Regular Season

Platform comparison

Market context

Movistar KOI and GIANTX are due to meet in the LEC regular season after the market was priced with KOI as a clear favourite, and the current 66% crowd-implied probability broadly matches that stance. Live listings for the fixture point to a best-of-three at 17:15 UTC, with the market still sensitive to last-minute schedule changes before the settlement window closes later today.[14][1]

Recent comparable meetings give KOI the stronger read, but not a lock. BO3-era previews and prior coverage repeatedly frame Movistar KOI as the more stable side in this matchup, with better historical head-to-head results and stronger objective control, while GIANTX’s route to an upset has usually come through early draft advantages and cleaner execution in individual games.[2][6][9] That is consistent with a price in the mid-60s rather than a near-certainty.

For traders, the main catalysts are confirmation that the series starts on time, any late roster or competitive-rule announcements, and whether either team enters with a materially altered patch read or substitution news. KOI’s edge is most defensible if the expected starters are unchanged and the series proceeds as a standard BO3; if there is a postponement, cancellation, or a forfeiture-related edge case, the market’s resolution rules become more important than pre-match form.[1][14]

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

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.

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.

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%.