Midterm betting tops 1.48 billion dollars amid questions over market reliability
Reuters reports more than 1.48 billion dollars has been wagered on the midterms, with Kalshi reporting 1.33 billion dollars in midterm volume and about 145 million dollars on Polymarket congressional markets across more than 28,000 markets. The platforms face scrutiny over candidates betting on their own races and research finding political markets can be shifted with relatively small bets.
More than 1.48 billion dollars has been wagered on the midterm elections, according to Reuters, putting prediction markets’ forecasting performance under scrutiny alongside their growing trading volume.
Kalshi reported 1.33 billion dollars in midterm volume, while about 145 million dollars was wagered on Polymarket congressional markets, according to Reuters. The reported activity spans more than 28,000 markets.
Trading scale meets integrity concerns
The platforms face scrutiny over candidates betting on their own races, Reuters reported. That issue raises a question distinct from forecasting accuracy: how markets handle participation by people directly involved in the outcomes being traded.
Reuters also cited research finding that relatively small bets can shift political markets. For readers interpreting election prices, that finding highlights the distinction between aggregate wagering volume and the resistance of individual markets to price movements.
What it means for prediction markets
- Volume is not a measure of accuracy. The reported 1.48 billion dollars-plus total establishes the scale of wagering, not whether market forecasts will prove correct.
- Individual markets warrant separate attention. Research on price shifts from relatively small bets suggests headline volume alone is insufficient to assess a particular contract’s reliability.
- Participant conduct is part of the scrutiny. Candidates betting on their own races puts market integrity alongside forecasting performance as an issue for the platforms.
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