Prediction markets called the midterms. Now they face the winners

What to know

• Markets on Kalshi and Polymarket anticipated the Democratic midterm wins before many pundits did, Politico reported on November 9.
• The same result could bring closer scrutiny of prediction markets in Washington.
• No specific bill or rule had been named in the reporting we reviewed.

The midterm elections gave prediction markets a result to brag about and a problem to manage.

Politico reported on November 9 that markets on Kalshi and Polymarket, the two largest platforms, anticipated the Democratic wins before many pundits did. Supporters of the platforms point to that as evidence the markets work as forecasting tools: when people have money on the line, prices absorb information quickly.

The problem is who won. According to Politico, the Democratic victories could open a period of closer scrutiny for the industry. The report describes regulators under the current administration as having embraced prediction markets over the past two years, which let the platforms expand quickly into contracts on politics, sports and stocks.

What we know and what we do not

The reporting we reviewed says Democrats intend to rein the platforms in. It does not name a specific bill, a hearing or a rule change. Until one of those appears, the practical effect on anyone trading these markets is nil.

Three things would turn the talk into something concrete:

• A committee hearing that calls platform executives or regulators to testify.
• Proposed legislation that limits which events can be traded, such as elections or sports.
• A change at the regulator, the Commodity Futures Trading Commission, in how it reviews new contracts.

Why it matters to traders

Rules about which contracts can be listed decide what you are able to trade. If you hold positions on a platform, read its terms on what happens to open contracts when a market is delisted. Platforms generally settle or refund them under their own rulebooks, and those rules differ.

If you are new to these markets, our explainer on how prediction market prices work covers what a contract price means and what it costs to trade one.

This article is general information. It is not investment advice, and trading involves the risk of losing money.

Sources

• Victorious Democrats vow to rein in prediction markets, Politico, republished by CDC Gaming, November 9, 2026

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