Sunday, October 11 was the biggest day in EventTracker's records, which run back to April 2026. The venues we follow recorded $5.39 billion in trading that day, and our board carried 49,688 live markets. Both numbers are the highest we have ever measured. It was an NFL Sunday, the day the National League Championship Series opened, and the morning after a college football Saturday that put Texas against Oklahoma and Georgia at Alabama. Saturday and Sunday together came to $10.35 billion.
Most of that money went through one exchange. Kalshi alone reported $3.96 billion, nearly three dollars in every four. Polymarket US added $699 million, followed by Novig, Nadex and Polymarket. What people traded tells the rest of the story: on Kalshi, $2.75 billion of the day, about 69 percent, came from combos, single tickets that tie several outcomes together. On Polymarket US the share was about 60 percent. This is what an NFL Sunday looks like now: you build a parlay, and an exchange prices it. One note on the numbers: like the exchanges themselves, we count volume at each contract's face value, the dollar it pays if it wins, not at the price people paid for it.
October 11 did not come out of nowhere. Since football returned in September, the daily record has fallen eight times, and the last four were consecutive Sundays: $4.05 billion on September 20, $4.38 billion on September 27, $5.00 billion on October 4 and $5.39 billion on October 11. Beneath the weekly spikes, the floor keeps rising too. Kalshi's typical day in May was about $565 million; so far in October it is about $2.47 billion. Prediction markets spent the summer proving they could carry a World Cup. This fall they are carrying a full sports calendar every week.
The other record is about breadth. On October 11 our board carried 49,688 markets across 28 venues, and 25 of those venues traded that day. Since late April we have seen 810,229 distinct markets come and go. Some of that growth is the market and some of it is us: we keep adding venues and reading deeper into each one, and we tell you so rather than calling it growth. Where a venue publishes official daily figures, as Kalshi, Polymarket US and Nadex do, we use them. Everywhere else we count only the events on our board, and we label that number for what it is, a floor.
If you are new here, this is what EventTracker is: one board for the whole prediction-market world. Federally regulated exchanges such as Kalshi, Polymarket US and Nadex sit side by side with crypto-native venues such as Polymarket, Limitless, Outcome.xyz and Pascal, and with sports exchanges such as Novig and ProphetX. In one place you can see the same question priced on several venues at once, what it costs to trade it at each one, where the big wallets are moving, and the news that moves the price, without keeping a dozen tabs open.
What makes EventTracker different is what it refuses to be. We take no bets, we hold no money, we carry no affiliate links, and no venue pays to be shown. That is rarer than it sounds: several of the sites that rank prediction markets earn a commission from the venues they send you to. Our job is to measure the whole market honestly and show it to you, including the parts that flatter nobody, us included. October 11 was a day to remember, and we will measure the next record the same way.
Tal Ayalon eventtracker.ai
Figures are EventTracker's own measurements for April 29 to October 14, 2026, pulled October 15. EventTracker is an independent data aggregator. We take no wagers, we hold no funds, and no venue pays us for coverage or placement. Nothing here is investment or wagering advice.