Prediction Markets Reach $10.8B Weekly Record

Prediction markets recorded $10.8 billion in trading for the week ending June 15, 2026, a new weekly industry record, A16z crypto reported on June 19. It was the first week the sector topped $10 billion.

Trading focused on contracts tied to the SpaceX initial public offering, the opening matches of the World Cup, the NBA Finals, the Stanley Cup Final and a proposed U.S.-Iran peace deal.

Platform-level data shared by A16z showed Kalshi and Polymarket accounted for the largest shares of the week’s volume. Additional activity took place on Opinion, Predictdotfun, Limitless, Myriad, Probable, HIP-4 and Rothera. Combined trading across those venues pushed total industry turnover to the new high.

The SpaceX listing opened at a reported $2.1 trillion valuation and attracted heavy interest from traders who used prediction contracts to price expectations for the company’s future valuation and milestones. Sports events generated contracts tied to game results and tournament progress. The proposed U.S.-Iran agreement produced contracts linked to diplomatic outcomes.

A16z’s data show weekly volume climbed sharply over the past year. A typical week a year earlier ran around $500 million. The weekly floor rose past $1 billion last autumn, passed $4 billion over the winter and sat in the $6 billion–$7 billion range this spring before reaching the June peak.

Prediction markets are platforms where users buy and sell contracts that pay out if specified events occur, allowing participants to set market-based probabilities for outcomes. The June record reflected activity across finance, sports and geopolitical markets and higher liquidity on several leading venues.

A16z crypto posted on June 19: “Prediction markets hit a record $10.8 billion in weekly trading volume in the week ending June 15 — their biggest week ever.”