Prediction Market Transactions Hit All-Time Record of 191 Million in March

Prediction market transactions hit an all-time record of 191 million in March, a 2,838% increase year-over-year. Monthly volume reached $23.9 billion as geopolitical contracts and mainstream media integration drive the sector's growth.

Prediction market transactions surged to an all-time record in March, with over 191 million transactions logged across platforms according to Dune Analytics data. That represents a 2,838% increase compared to March 2025.

Monthly notional trading volume reached approximately $23.9 billion, up from $1.9 billion a year ago. While that figure is still around 12% below January's all-time peak of $26.7 billion, the growth in transaction count and user base suggests the sector is broadening rather than simply seeing larger individual bets.

Iran Contracts Set the Single-Day Volume Record

The composition of trading activity has shifted considerably. According to a report published by TRM Labs, geopolitical events, macroeconomic decisions, and political contests now account for the bulk of prediction market volume. Crypto-specific contracts have taken a back seat.

Iran-related contracts were among the most active on Polymarket in late March, with markets tied to the timing and escalation of military action drawing large volumes. On February 28, Polymarket set a single-day volume record of $425 million, driven almost entirely by Iran-related markets resolving simultaneously. One contract alone surged from $23,000 in volume to $29.6 million in a single day.

On Kalshi, the exotics category overtook politics in late February to become one of the top three categories by weekly volume, suggesting the range of events people are willing to bet on continues to expand.

Unique Wallets Tripled to 840,000 in Six Months

The growth isn't just coming from existing users trading more. Monthly unique wallets tripled to nearly 840,000 by February 2026, according to TRM Labs. That points to a widening user base rather than heavier activity from a fixed group of participants.

TRM attributed the expansion to several factors: improved platform accessibility, clearer regulatory pathways in the U.S., and integration with mainstream financial media. Prediction market odds now appear on Google Finance and are regularly cited in broadcast and print coverage of elections and geopolitical events, giving the sector visibility it didn't have a year ago.

Google Finance Now Shows Prediction Market Odds

One of the more notable shifts is how prediction markets are being used outside of the platforms themselves. Rather than being treated purely as betting venues, their odds are increasingly referenced by journalists and analysts as real-time sentiment indicators alongside traditional polling and market data.

That feedback loop appears to be accelerating growth. As mainstream coverage increases, more users discover the platforms. As more users participate, the markets become more liquid and their signals become harder for media to ignore.

Washington State Sues Kalshi as Regulators Take Notice

The record volumes have also attracted regulatory attention. On March 27, Washington state's Attorney General filed a lawsuit against Kalshi, alleging the platform violated the state's Gambling Act and Consumer Protection Act. The case adds to an ongoing debate about whether prediction market contracts should be classified as financial instruments or gambling.

TRM Labs also flagged clusters of potentially coordinated wallet activity around major geopolitical events, including recent U.S. airstrikes against Iran. Several well-timed bets across prediction markets, options, and oil futures have drawn scrutiny, though no official investigation had been confirmed as of March 29.

For the sector, the tension is familiar: the same growth that validates prediction markets as a serious financial tool also invites the kind of oversight that could reshape how they operate.