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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.

Noche UFC: Jessie Rosas vs. Sean King (Fe… | Kalshi Vs Polymarket 2026

Name: Noche UFC: Jessie Rosas vs. Sean King (Featherweight, Prelims)
Start: 2026-09-05T22:00:25.000Z
End: 2026-09-13T03:59:59.999Z

Platform comparison

Platform	YES odds	NO odds	Fee	KYC	Settlement
Polymarket (via Kalshi vs Polymarket) Pick polygram.ink (preferred broker)	71%	29%	0% (USDC on-chain)	No-KYC up to $1,500	USDC, auto via UMA oracle	View on Polymarket →
Polymarket (direct) polymarket.com	71%	29%	0%	Geo-blocked in US/UK/EU	USDC, on-chain	View on Polymarket →
Kalshi kalshi.com	—	—	Up to 7% per trade	US-only, KYC required	USD	View on Polymarket →
Betfair Exchange betfair.com	—	—	2-5% commission	Full KYC from first trade	GBP / EUR	View on Polymarket →
Manifold Markets manifold.markets	—	—	Play-money (mana)	None — play-money	Mana (no cash-out)	View on Polymarket →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

Outcome	Probability
O/U 0.5 Rounds	71%
O/U 1.5 Rounds	60%
O/U 2.5 Rounds	52%
Ends before Round 3?	45%
Decision or Draw	44%
Fight won by decision?	43%
Fight to Go the Distance?	42%
Fight won by KO/TKO?	38%
Jessie Rosas vs. Sean King	36%
King to win by KO/TKO?	36%
Fight won by submission?	35%
Ends before Round 2?	35%
King in Round 1	31%
Rosas to win by KO/TKO?	28%
Rosas in Round 1	28%
King in Round 2	28%
King in Round 3	28%
Rosas in Round 2	27%
Rosas in Round 3	26%

Market context

Traders on decentralised prediction markets give 71% probability to noche ufc: jessie rosas vs. sean king (featherweight, prelims). This market will resolve to "Jessie Rosas" if Jessie Rosas is officially declared the winner of the fight against Sean King at Noche UFC: Silva vs. Delgado, scheduled for September 12, 2026. It will …

Live Data & Statistics

The Polymarket order book prices O/U 0.5 Rounds at 71% for "Noche UFC: Jessie Rosas vs. Sean King (Featherweight, Prelims)".

O/U 0.5 Rounds 71% Other 29%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $90K.

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.

FAQ

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.
What does Polymarket cost to trade?: Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
Do I need to KYC for this market?: On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
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.

Jordan LeeSports Prediction Reporterand

Chris ReedPolitical Forecasting Editor

Trade Noche UFC: Jessie Rosas vs. Sean King (Featherweight… on Kalshi vs Polymarket

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Noche UFC: Jessie Rosas vs. Sean King (Featherweight, Prelims)

Platform comparison

Outcome probabilities

Market context

Live Data & Statistics

Methodology

Resolution & payout

FAQ

Trade Noche UFC: Jessie Rosas vs. Sean King (Featherweight… on Kalshi vs Polymarket

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