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Warren and Curtis seek election trading safeguards from Kalshi and Polymarket

Financial Regulation News says Senators Elizabeth Warren and John Curtis wrote to Kalshi CEO Tarek Mansour and Polymarket CEO Shayne Coplan seeking details on safeguards against insider trading, manipulation and wagers based on material nonpublic information. The senators cited candidates trading on their own races and asked for written responses by November 3.

Senators Elizabeth Warren and John Curtis have asked Kalshi and Polymarket to explain their protections against insider trading and manipulation, according to Financial Regulation News. Their request also covers wagers based on material nonpublic information.

Questions for platform leaders

The senators wrote to Kalshi CEO Tarek Mansour and Polymarket CEO Shayne Coplan seeking details on those safeguards, Financial Regulation News says.

They cited candidates trading on their own races. That concern puts the handling of election-related information at the center of the request, alongside broader questions about market manipulation.

Election Day deadline

Warren and Curtis requested written responses by November 3, Election Day. The deadline coincides with the publication date of the Financial Regulation News report, Nov 3, 2026, at 5:30 AM ET.

The supplied summary does not include responses from either company or describe the controls currently in place. It therefore establishes the senators’ request, but not whether either platform’s safeguards meet their concerns.

What it means for prediction markets

  • Election-market integrity is under scrutiny: The senators’ example concerns candidates trading on their own races, making participant access and information advantages key issues to watch.
  • Platform responses are the next checkpoint: The November 3 deadline gives readers a specific date for the requested explanations; the supplied material does not establish whether responses have arrived.
  • Questions are not findings: The request alone does not establish misconduct, inadequate safeguards or a forthcoming change to trading rules.
KalshiPolymarketElectionsInfiniti MarketsInfiniti Signals

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    Financial Regulation News
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