South Carolina Republican Senate Special Primary Winner

Platform comparison

Market context

Polymarket prices this contract at **0% YES**, which means the market is currently assigning no value to a South Carolina special Republican Senate primary winner being settled on the contract’s terms. In practical terms, you are holding conditional tokens on Polygon and funding them in USDC, so the question is not just who wins but whether the exchangeable on-chain event resolves to a recognised Republican nominee from the state’s official process.

The nearest analogue is South Carolina’s own recent special primary timetable: filing closed on 28 July, early voting runs 5–7 August, the special primary is set for 11 August, and a runoff would follow on 25 August if nobody clears 50%. State officials have already said a runoff is possible, and the field is unusually broad, with a dozen Republicans filed, including sitting congressmen Russell Fry and Ralph Norman, former governor Mark Sanford, Mark Lynch, Duke Buckner and others. That kind of crowded field matters because it increases the chance of a split vote and a second round, which is often where contracts like this get repriced.

For traders, the key catalysts are procedural rather than rhetorical: confirmation of the ballot, turnout signals from early voting, and any late withdrawals or endorsements that could consolidate anti-front-runner votes. The South Carolina Election Commission and state votes site have published the primary and runoff schedule, so the market should react most sharply to whether 11 August produces a clear winner or pushes the outcome to 25 August, and, if the special primary were ever cancelled or left unresolved, to the official Republican nominee for the November contest instead.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track South Carolina Republican Senate Special Primary Winner across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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.

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.

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.