Dune: Polymarket and Kalshi had $2B+ in notional trading volume in the week ending October 19, exceeding the previous peak during the 2024 presidential election
Context & Ripple Effects
The October surge broke the election-era high-water mark for the two leading venues, indicating that activity was no longer confined to a single political event. It preceded a reported acceleration to $13B in monthly prediction-market bets in November, with Polymarket and Kalshi competing for the same liquidity.
Later coverage shows that scale did not settle the contest: Kalshi moved ahead of Polymarket in global volume as product delays reportedly weighed on its rival. That makes this early volume peak relevant as evidence of a market where execution and liquidity can quickly reshape leadership.
First-order effects
- Polymarket and Kalshi gain a new combined weekly notional-volume benchmark, strengthening their ability to present their markets as active venues beyond election-driven trading.
- The higher turnover immediately raises the value of deep order flow for both platforms, since participants can more readily enter and exit positions when counterparties are available.
Second-order effects
- The shared liquidity pool becomes more contested: each platform has greater incentive to improve product delivery, distribution, and market selection to retain traders rather than merely benefit from category growth.
- More visible volume can draw attention to the platforms' partnerships with purported breaking-news social accounts and to their efforts to influence the regulatory environment, because those channels affect how users discover and access markets.
Third-order effects
- If elevated activity persists across non-election topics, prediction markets could evolve from event-specific trading spikes into broader information and risk-pricing platforms; the later divergence in platform volumes suggests that category growth alone will not guarantee incumbent leadership.
- Liquidity may become the industry’s central structural advantage: platforms that sustain active markets can compound participation, while weaker product execution can break that loop even in a growing category.
The trend: Prediction markets are shifting from election-centered bursts toward a platform race in which recurring liquidity, product execution, and distribution determine who captures expanding demand.