Prediction markets post record week with $2.7M in fees

Prediction markets recorded their highest-ever weekly fees, generating more than $2.7 million as activity surged across major platforms.

Opinion led the sector, accounting for more than half of total fees and collecting over $1.5 million during the week.

The platform’s average weekly trading volume rose to $115.6 million, with open interest reaching $151.6 million, signalling active short-term trading.

Polymarket followed with a strong showing, driven largely by its short-duration markets, which produced $787,000 in weekly fees.

Polymarket’s seven-day trading volume climbed above $112 million, with open interest standing at $335.7 million, the highest in the sector.

Kalshi remained the largest platform by overall market share, capturing more than half of weekly trading volume.

Kalshi posted average weekly volume of $307.6 million and open interest of $334.6 million.

Smaller platforms also expanded rapidly, with Probable posting the fastest growth rate from a lower base.

Analysts said rising fees, volumes and open interest point to a maturing prediction market sector driven by short-term and opinion-based trading.