LoL: Cloud9 vs LYON (BO5) - LCS Playoffs

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Active sub-markets

Market context

Cloud9 face LYON in the League of Legends Championship Series upper bracket final on 7 June, a best-of-five match that will determine one finalist for the LCS grand final. The current market prices Cloud9's victory at 27 per cent on Polymarket, implying LYON as heavy favourites at 73 per cent. This pricing reflects LYON's stronger regular season performance and recent form, though the conditional token structure on Polygon means traders holding YES positions benefit from any shift in perception before the 8 June settlement window closes.

Historical LCS upper bracket finals show pronounced variance in seeding strength. Cloud9 have won three LCS titles but entered recent playoffs as lower seeds; LYON secured top-seeding credentials through consistent regular season play. When examining comparable matchups where the lower-seeded team faced favourites in best-of-five formats, upset rates hover around 30–35 per cent, suggesting the current 27 per cent probability sits slightly below historical norms for such fixtures. Cloud9's institutional experience in high-pressure elimination matches provides a tangible edge that raw regular season records may underweight.

Traders should monitor roster availability and any schedule adjustments announced by Riot Games in the days preceding 7 June. Injury reports or last-minute roster changes could materially shift the conditional token valuations, particularly given the best-of-five format's sensitivity to player availability. The match's timing at 4:00 PM ET creates a defined catalyst window; any delays beyond the seven-day threshold would trigger the 50-50 resolution clause, a tail risk currently priced into the USDC liquidity pools.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.