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Midterm trading exceeds $3 billion across Kalshi and Polymarket

Markets on Kalshi and Polymarket recorded more than 3 billion dollars in combined volume during the 2026 United States midterms, according to PANews reporting cited by Binance. Kalshi reported about 98 percent accuracy, with 679.2 million dollars in politics open interest and 1.5 billion dollars in sports volume.

Kalshi and Polymarket recorded more than $3 billion in combined trading volume during the 2026 United States midterms, according to PANews reporting cited by Binance. The figure captures election-market activity across the two platforms.

Volume and accuracy measure different things

Kalshi reported about 98 percent accuracy, according to the same reporting. The supplied summary does not explain how that figure was calculated or identify the contracts included, limiting what can be inferred about forecasting performance.

The combined volume figure measures trading activity, rather than prediction quality. The summary does not provide a platform-by-platform breakdown of the more than $3 billion total.

Kalshi’s broader activity

Kalshi also reported $679.2 million in politics open interest and $1.5 billion in sports volume, according to PANews reporting cited by Binance.

Those figures describe different measures of market participation: politics open interest is distinct from sports trading volume. The summary does not specify their measurement periods, so they should not be treated as directly comparable with the combined midterm volume.

What it means for prediction markets

  • Election trading reached substantial scale: Kalshi and Polymarket together recorded more than $3 billion in volume during the 2026 United States midterms, though their individual contributions were not supplied.
  • Accuracy requires methodological context: Kalshi’s reported about 98 percent accuracy cannot be assessed fully without details on calculation and contract coverage.
  • Metric distinctions matter: The $679.2 million in politics open interest and $1.5 billion in sports volume offer separate views of Kalshi activity, not a like-for-like comparison.
KalshiPolymarketElectionsMidtermsInfiniti MarketsInfiniti Signals

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    Binance
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