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Prediction Markets Kalshi and Polymarket Garner Attention During Midterm Elections

Prediction market platforms Kalshi and Polymarket reportedly played a notable role in the lead-up to recent midterm elections, offering users new ways to speculate on political outcomes.

PredictionSites Newsroom · 24 September 2026

Leading prediction market platforms, Kalshi and Polymarket, have reportedly attracted considerable interest during the recent midterm elections. Both platforms provide markets where users can trade contracts based on the future outcome of various events, including political races. This activity has led some observers to label the period as potentially the "first prediction-market election."

Prediction markets operate by allowing individuals to buy and sell contracts that pay out if a specific event occurs. The price of these contracts often reflects the market's collective belief, or probability, regarding the likelihood of that event happening. For instance, a contract predicting a particular candidate's victory might trade at 80p if the market believes there's an 80% chance of that outcome.

While traditional polling surveys aim to gauge public opinion directly, prediction markets aggregate the financial stakes of participants. This mechanism can sometimes offer an alternative perspective on potential election results. Kalshi, regulated in the US for event contracts, and Polymarket, a decentralised platform, both facilitated such trading, allowing users to engage with and speculate on the evolving political landscape throughout the midterm campaigns.

The engagement of these platforms during such a significant electoral cycle highlights a growing trend in how information and sentiment surrounding major events are being quantified and traded. This increased visibility marks a notable moment for the prediction market industry as it continues to evolve and integrate into public discourse.

Reported first by CNN — read the original report. This article was written by the PredictionSites newsroom from that report.