Catenaa, Saturday, October 18, 2025- Prediction market platforms Kalshi and Polymarket recorded a combined $1.44 billion in trading volume during September, fueled by strong institutional support and growing mainstream adoption.
Polymarket raised $2 billion from the Intercontinental Exchange, valuing the platform at $9 billion, while Kalshi secured $300 million at a $5 billion valuation.
The funding has created at least one new billionaire, with Polymarket founder Shayne Coplan recognized by Bloomberg as the youngest self-made billionaire following the raise.
Kalshi achieved a 60% peak market share in September, reversing earlier dominance by Polymarket. Kalshi’s growth is partly credited to its Robinhood partnership, allowing users to place sports bets within the trading app, while Polymarket remains fully on-chain, offering publicly verifiable market data.
The surge underscores the rise of prediction markets as a mainstream speculative venue, with integration into popular trading platforms expanding beyond crypto-native users.
Analysts note that these platforms are increasingly blending decentralized finance mechanisms with traditional investment interfaces, reflecting growing institutional confidence and retail engagement.
