Polymarket and Kalshi Dominate as Prediction Market Weekly Volume Rockets Past $2 Billion

Dune Analytics data shows prediction markets are buzzing this week, racking up more than $2 billion in total volume across Myriad, Limitless, Kalshi, and Polymarket — with the latter pair pocketing most of the betting frenzy. Over on Polymarket, open interest shot up to $202 million by Monday, proving that traders aren’t just watching—they’re piling in.

Polymarket Open Interest Doubles Since August, Kalshi Transactions Spike

Prediction markets are crackling with energy, and the reigning heavyweights—Polymarket and Kalshi—have been stealing the spotlight with plenty of high-stakes action lately.

These platforms let users wager on real-world events—everything from when the government shutdown will finally wrap up to who’ll snag New York City’s mayoral seat. Bettors are placing odds on the Fed’s next October move and even speculating about what Trump might say during the Australian prime minister’s visit that same month.

Speculators can throw their bets behind just about anything—NFL, MLB, and soccer matchups, tech and crypto price forecasts, celebrity drama, or even global headlines like wars and ceasefires. Dune’s metrics reveal things have been absolutely blazing these past few weeks.

While Polymarket’s open interest hasn’t quite hit last year’s U.S. election highs, it’s still on a heater—jumping from $111 million on Aug. 4 to a hefty $202 million today. A Dune dashboard from user @rchen8 shows Polymarket’s daily volume has been climbing fast since early Sept. Add up the action from Myriad, Limitless, Kalshi, and Polymarket over the past week, and you’re looking at a combined haul topping $2 billion, per @dunedata’s dashboard.

Transactions, however, paint a different picture. For the week starting Oct. 13, 2025, total prediction market transactions hit a hefty 6.6 million, according to Dune Analytics. Kalshi topped the leaderboard with 3,575,459 trades, while Polymarket followed close behind with 2,586,903. Limitless added 378,063 to the mix, and Myriad chimed in with 66,472.

Overall activity has been climbing steadily since mid-2025, now clocking its busiest week ever as Kalshi and Polymarket continue to rule the betting arena. Once again, the data is showing Prediction markets are proving they’re more than a passing craze—turning speculation into a full-blown spectator sport with some high levels of accuracy.

With billions flowing through prediction markets and millions of transactions lighting up the boards, the action isn’t slowing down anytime soon. If anything, it’s only getting juicier as traders keep betting on politics, pop culture, and everything in between.

FAQ 🧭

• **What are prediction markets?**Prediction markets let users bet on real-world outcomes—from politics and sports to crypto and global events.
• **Which platforms dominate prediction market activity?**Polymarket and Kalshi currently lead in volume and engagement, handling the bulk of market action.
• **How much money flows through these markets?**Combined weekly volume across Polymarket, Kalshi, Myriad, and Limitless recently topped $2 billion.
• **Why are prediction markets gaining traction in 2025?**Traders are embracing them as a fast, data-driven way to speculate on everything from elections to entertainment.