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Kalshi midterm activity spans 100 races as election day approaches

The tracker counts 249,801,059 contracts traded across the 2026 Senate, House and chamber-control markets on Kalshi, with 17,632,142 contracts traded in 24 hours and 100 live races listed ahead of the November 3 elections.

Kalshi’s 2026 midterm markets have recorded 249,801,059 contracts traded across Senate, House and chamber-control contests, according to PredictionMarketPicks. The tracker lists 100 live races ahead of the November 3 elections.

Trading activity and outstanding positions

The update, published Oct 31, 2026 at 7:00 PM ET, puts trading over the preceding 24 hours at 17,632,142 contracts. That daily figure sits within the tracker’s broader tally of election-market activity.

PredictionMarketPicks also reports 170.2 million contracts in open interest. That measure captures outstanding positions rather than cumulative trading, making it distinct from the total number of contracts traded.

What the figures show—and leave out

The figures describe participation across the tracked markets, but the supplied summary does not break out activity by race or chamber. It also provides no candidate prices or chamber-control probabilities, so the totals alone do not establish which outcomes traders favor.

What it means for prediction markets

  • Activity is not a directional signal: The 249,801,059-contract total measures trading, not the probability of a particular election result.
  • Open interest adds a separate perspective: The reported 170.2 million outstanding contracts should not be treated as interchangeable with trading volume.
  • Race-level detail remains missing: With 100 live races listed, aggregate figures do not show where activity is concentrated ahead of November 3.
KalshiSenateInfiniti MarketsInfiniti Signals

Sources & attribution

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    PredictionMarketPicks
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