Polymarket and Kalshi Drive Growth in Sports Betting

Market Dominance: Polymarket and Kalshi control 98% of the prediction market volume in sports betting, reflecting a significant shift in the landscape following regulatory challenges and strategic expansions.

Surge in Volume: The prediction market volume surged by 580% to $340 million by November 2025, with sports contracts driving much of the activity and attracting substantial investor interest.

Regulatory Impact: Kalshi's court victories have enabled it to launch sports event contracts in states without legalized sports betting, while Polymarket has adapted its strategies in response to regulatory scrutiny.

Investment Growth: The sector has attracted $2.7 billion in startup funding, with Polymarket securing approximately $2.15 billion, highlighting the increasing institutional interest and the complex regulatory environment shaping future developments.