John Gramlich: Kalshi and Polymarket monthly trading doubled from $26 billion to $53 billion in 2026

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25.09.2026

John Gramlich: Kalshi and Polymarket monthly trading doubled from $26 billion to $53 billion in 2026 — Kalshi Polymarket volume more than doubles

John Gramlich reports that users on Kalshi and Polymarket traded $26 billion in May 2026. Trading volume more than doubled to $53 billion by July 2026.

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John Gramlich previously reported on financial strains at a major U.S. university, which is managing a $2.5 billion endowment and a 150-year history. The institution is now facing significant challenges affecting large stakeholders. Details are available in his coverage of the university's endowment challenges.

This material may contain third-party opinions, none of the data and information on this webpage constitutes investment advice according to our Disclaimer. While we adhere to strict Editorial Integrity, this post may contain references to products from our partners.

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