TLDR Kalshi traded $4.15 billion on Election Day, its busiest weekday on record. The total stayed below the $5.3 billion record set on Saturday, Oct. 24. Parlay-style combos fell to 58.6% of volume, their lowest share since at least Oct. 10. Texas’ Senate race led all election markets at $108.1 million. Kalshi and Polymarket both settled House and Senate control for Democrats on Nov. 4.
Kalshi recorded $4.15 billion in notional volume on Tuesday, Nov. 3, the day of the U.S. midterm elections. The figure comes from the exchange’s daily market data and is its busiest weekday on record.
The total still fell short of the $5.3 billion record set on Saturday, Oct. 24. It also trailed the $4.79 billion traded a week later on Saturday, Oct. 31.
Election Day volume was 50.5% higher than the previous Tuesday, Oct. 27, when Kalshi traded $2.76 billion. Kalshi’s daily reports run on U.S. Eastern time.
Single Contracts Carried Election Day
What traders bought stood out more than the total. Single-market contracts, rather than bundled bets, drove the activity.
Combos are Kalshi’s parlay-style contracts, which bundle several outcomes into one. They had powered most of the exchange’s earlier daily records, and many were long shots priced below 1 cent.
Election trading on the prediction market platform Kalshi topped $2.5 billion, nearly doubling its 2024 total as traders weighed the battle for Congress. https://t.co/2a4RTk4ycC
— KARE 11 (@kare11) November 5, 2026
On Election Day, combos accounted for $2.43 billion, or 58.6% of volume. That compares with 75.5% on Oct. 24 and 73.9% on Oct. 31, and it was the lowest share of any day since at least Oct. 10.
Trading outside combos came to about $1.72 billion. That was roughly a third more than the $1.30 billion on