Late Democratic bets swell prediction markets as midterm polls close

According to Reuters, via Hot96, midterm election wagering exceeded 1.48 billion dollars, with a late burst of activity arriving after the first polls closed at 6 p.m. ET.

Analytics firm BETINT found that traders placed more than 4 million dollars in bets within minutes of those initial closures. Most of that money backed Democrats.

Large wagers punctuate the late trading

A single Polymarket bet of 951,198 dollars on Democrats winning control of the House led the late wagers, according to Reuters.

Kalshi also saw concentrated activity: nearly 934,000 dollars in election bets arrived in a single second. The figures show how much money could enter these markets in a very short window, without establishing how many traders were involved.

Senate contest draws substantial volume

Beyond the House-control betting, the Texas Senate race alone had attracted nearly 67 million dollars in wagers as of October 29, according to the Anti-Corruption Data Collective, cited in the reporting.

That earlier tally provides a separate measure of interest in an individual contest. It should not be confused with the bets recorded just after polling places began closing.

What it means for prediction markets

• Timing matters: The more than 4 million dollars in late bets followed the first poll closures, not the closure of all polls.
• Large bets are not broad consensus: The 951,198 dollar Polymarket wager represents a substantial individual position; the supplied figures do not establish how widely that view was shared.
• Volume is not probability: The reporting details money wagered, but provides no corresponding contract prices or odds changes with which to assess shifts in market expectations.