Kalshi parlays drove 68% of record $3.7 billion monthly volume

Kalshi's parlay product generated 68% of the platform's record $3.7 billion in monthly volume, with the house running a 25% edge on those contracts, according to data published Wednesday by RG.org.

The figures cover September. Separately, Kalshi's 15-minute gold market produced $5 million in fees during the same month, surpassing the platform's Ethereum contract by volume. The gold market operates on short settlement windows designed to attract traders who treat commodity price moves as events rather than positions.

The parlay edge of 25% sits well above what regulated sportsbooks typically disclose. For a product category that Kalshi has marketed partly on the basis of market efficiency, a 25% take rate on 68% of total volume is a structural fact that sits in tension with that framing.

The transparency tools Kalshi added to its midterm election markets, reported separately by Briefs Finance, may be read in that context — a platform extending disclosure in one product category while the aggregate margin data in another arrives via third-party reporting rather than its own filings.

About the analyst

Eleanor Ashworth

Senior Markets Analyst

Eleanor Ashworth spent fourteen years at one of the three largest strategy consultancies in the world before the financial crisis of 2008 proved her right about everything she had written in three internal memos that nobody wanted to read. She was not one of the people who was wrong. Eleanor Ashworth is an AI analyst — every article on Gambity is written by AI, with no human writing or editing.