Kalshi recorded a sharp rise in activity during the 2025 NCAA Men’s Basketball Tournament, with trading volume exceeding $800 million during the opening weekend. The figure marks a significant increase compared to the previous year and highlights growing participation in regulated prediction markets tied to major sporting events.

The volume generated over the first few days nearly matched the platform’s entire March Madness trading activity in 2024. During that earlier tournament, total trading reached approximately $450 million, with $208 million recorded across the first two rounds alone. The latest figures indicate that engagement has accelerated, with early rounds in 2025 surpassing those benchmarks in a short period.

Market data also showed broader activity across the platform. Total trading volume last week exceeded $3.4 billion, with around $1.6 billion linked specifically to basketball-related contracts. These numbers suggest that interest extends beyond individual games to a wider range of event-based markets.

Incentives and Market Expansion Drive Participation

Kalshi introduced additional incentives during the tournament, including a $1 billion prize for participants who could correctly predict a perfect bracket. The promotion also offered $1 million to the top-performing entry if no participant successfully selected all outcomes.

The platform’s offering included contracts covering individual games, tournament progression, and statistical outcomes. These products differ from traditional betting formats, as participants trade contracts that settle at fixed values depending on results.

The surge in activity has been linked to improvements in accessibility and user engagement. Updates to mobile functionality and educational resources helped broaden participation, while integration efforts expanded the platform’s reach.

Industry observers pointed to the rapid increase in volume as an indicator of changing user behavior. “The volume figures represent a watershed moment for prediction markets,” observed financial technology researcher Dr. Elena Martinez. “When a single weekend’s trading surpasses an entire previous tournament’s activity, it demonstrates mainstream adoption.”

Kalshi operates under oversight from the Commodity Futures Trading Commission, a factor that has influenced participation by providing a defined regulatory framework. Approval of event-based contracts in 2024 allowed the platform to expand its offerings and attract a wider range of users, including institutional participants.

“Regulatory approval changed everything,” noted sports finance attorney Michael Chen, as Cryptorank reports. “Institutional investors previously avoided prediction markets due to uncertainty. Now they participate alongside retail traders.”

At the same time, the growth of prediction markets has drawn attention from sports organizations. The NCAA has expressed concern about the potential impact of such platforms on competition integrity.

NCAA President Charlie Baker recently contacted regulators to request a temporary suspension of trading tied to college sports events. The regulator has not issued a public response to that request.

An NCAA spokesperson said, “Sport integrity is paramount for the NCAA, and despite the recent CFTC memo, we remain deeply concerned by unprotected prediction markets that pose a threat to competition integrity and student-athlete safety.”

Technology and Market Functionality Support Growth

The platform’s infrastructure played a role in supporting increased activity. During the opening weekend, Kalshi processed more than 2.5 million trades while maintaining system uptime of 99.98 percent. These figures reflect upgrades made ahead of the tournament to handle higher transaction volumes.

System improvements included adjustments to processing capacity and performance, allowing the platform to manage traffic levels significantly above normal conditions.

Prediction markets also provide data through price movements, reflecting collective expectations about outcomes. During the tournament, contract pricing adjusted in real time as games progressed, offering insights into probabilities based on participant activity.

These dynamics have contributed to the broader appeal of prediction markets, positioning them as an alternative to traditional sports betting. Industry estimates suggest sportsbooks are expected to generate approximately $3.3 billion from March Madness, placing prediction market activity within a comparable range.

Kalshi’s performance during the tournament indicates that participation in these markets continues to expand, supported by regulatory developments, platform improvements, and increased public awareness.