Prediction markets are experiencing a boom. In September, the combined trading volume on the Kalshi and Polymarket platforms reached $1.44 billion — a record high for the industry. Growing interest from institutional investors and integration with retail platforms are taking this segment to a new level.
Soaring valuations and new billionaires
Polymarket and Kalshi announced new funding rounds that sharply increased their capitalization. According to The Block, Polymarket raised $2 billion from Intercontinental Exchange (ICE), reaching a valuation of $9 billion, while Kalshi raised $300 million at a $5 billion valuation.
According to Bloomberg, after the deal, Polymarket founder Shane Coplan became the youngest self-made billionaire in the industry. This highlights how rapidly investor interest in decentralized event probability trading platforms is growing.
Kalshi overtakes Polymarket
In September, Kalshi captured 60% of the market, surpassing Polymarket in trading volume for the first time. At the beginning of the year, Polymarket was the leader, but the situation changed after Kalshi reached a mass audience.
A key factor was the launch of a partnership with Robinhood. Users can now place bets on sporting events directly through the Robinhood interface, which brought Kalshi an influx of retail clients and a noticeable increase in activity.
Different approaches to infrastructure
The platforms are developing in different directions. Kalshi operates off-chain: its data is available only via API, which raises questions among some analysts about the transparency of its statistics.
Polymarket, on the other hand, operates entirely on the blockchain. All trades, quotes, and positions are publicly available, making the platform a benchmark for transparency in the industry. This approach maintains community trust, especially among participants focused on on-chain data verification.
Institutional interest in prediction markets
The rapid growth of both platforms shows that prediction markets are moving beyond the crypto investor niche. The emergence of major partnerships, integration with traditional fintech companies, and participation from institutional funds are making them a new tool for analysis and speculation.
Analysts note that the $1.44 billion volume in a month is not just a record, but a signal of a new asset class forming. Prediction markets are becoming part of the mainstream and competing with derivative instruments, offering the market a unique way to assess event probabilities.
What’s next?
The merging of traditional and blockchain trading mechanisms could change the very nature of prediction markets. If the trend continues, Kalshi and Polymarket will become platforms where event bets turn into a full-fledged investment analysis tool.
Read more: Polymarket is turning into an arbitrage arena: how traders earn without risk
