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A Republican sweep costs 9.9c on Kalshi and 8.5c on Polymarket

DeFi Rate's Oct. 15 disagreements board flags the matching sweep contracts as a like-for-like venue gap, with the Kalshi price 1.4 points higher — a sweep-pricing gap…

A Republican sweep is priced at 9.9c on Kalshi and 8.5c on Polymarket, according to DeFi Rate’s Oct. 15 disagreements board. The comparison puts Kalshi 1.4 points above Polymarket.

A gap between matching contracts

DeFi Rate identifies the sweep contracts as a like-for-like comparison across the two venues. Its reported discrepancy is therefore between matching contracts, rather than differently framed political outcomes.

The item was published on Oct 15, 2026 at 6:39 AM ET. The supplied summary provides a snapshot of the price difference, but no history showing whether that spread has widened or narrowed.

The full source text was unavailable. Beyond the summary’s characterization of the contracts as matching, the supplied material does not include settlement terms, trading volume or an explanation for the difference.

What it means for prediction markets

  • Venue pricing differs: Kalshi’s reported Republican-sweep price is 1.4 points higher than Polymarket’s for what DeFi Rate describes as matching contracts.
  • The snapshot has limits: The supplied information does not establish how persistent the gap is or whether both displayed prices could be traded simultaneously.
PredictionMarketsKalshiPolymarketElections

Sources & attribution

  1. [1]Defirate (defirate.com)https://defirate.com/?s

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