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US Prediction Market Platforms Face Regulatory Scrutiny and Volume Allegations

Polymarket is reportedly under investigation by the CFTC, while Kalshi has addressed claims regarding artificial trading volume on its platform.

PredictionSites Newsroom · 21 September 2026

Leading US prediction market platform Polymarket is reportedly facing an investigation by the Commodity Futures Trading Commission (CFTC). The nature or specifics of this probe have not been disclosed, but it highlights the ongoing regulatory landscape that firms operating in the event contract space must navigate.

Separately, Kalshi, another regulated US exchange for event contracts, has recently responded to allegations concerning ‘fake volume’ on its platform. These claims suggest that some trading activity might not represent genuine market interest. Kalshi has refuted these accusations, aiming to maintain confidence in the integrity of its markets.

Both developments underscore the scrutiny faced by prediction market operators as they seek to establish and grow their presence. Platforms like Polymarket and Kalshi allow users to trade on the future outcome of various real-world events, providing a mechanism for collective forecasting and hedging through financial contracts. Ensuring market integrity and adhering to regulatory standards are crucial for the continued development and acceptance of this nascent industry.

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