KY-04 Republican Primary: Margin of Victory

Platform comparison

Active sub-markets

Market context

Kentucky’s 4th District Republican primary was held on 19 May, and this market pays on the size of the vote gap between the top two finishers once the result is certified. In practice, that means the contract is driven by the final official percentage spread rather than the winner alone, with any late count changes, absentee ballots or tabulation corrections able to move the settlement outcome if they alter the first- and second-place totals. With the crowd currently showing 0% for YES, traders are effectively pricing no residual uncertainty around the published race.

For context, margin markets in low-turnout congressional primaries often resolve to wider-than-expected spreads when one candidate has a clear endorsement advantage, stronger name recognition, or better-funded turnout operations. In Kentucky’s Republican primaries, incumbency and local machine support have historically mattered less when national party figures and outside groups become involved, which can compress the field and produce a decisive gap. Here, the relevant benchmark is not just the winner, but whether the second-place candidate can stay close enough to avoid a blowout settlement band.

The main catalysts now are procedural rather than campaign-driven: county canvass timing, any reported absentee or provisional ballot adjustments, and the official certification schedule from Kentucky election authorities. Traders should also watch whether major outlets or the state results portal update vote totals after election night, as prediction markets settle on the final valid vote percentages in the race. Because the contract settles in USDC on-chain, spot movements in BTC or ETH only matter indirectly through broader risk appetite and liquidity conditions; funding rates and whale flows are not part of the election mechanics, but they can still affect how aggressively market makers quote around a near-final political event.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads KY-04 Republican Primary: Margin of Victory 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 for comparison. Every CTA routes to PolyGram, 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.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, 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 does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within 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.