Kalshi sets back-to-back daily volume records as parlays drive 70% of trading

Kalshi just had the busiest weekend in its history. Then it topped that the next day. The CFTC-regulated prediction market recorded $3.91 billion in notional volume on October 10, 2026, followed by $3.96 billion on October 11. Both figures beat the prior single-day high of $3.68 billion, set on October 4. That record had been standing for a grand total of one week. The catch, if you want to call it that: roughly 70% of the action came from parlay-style “combo” contracts. Those products inflate headline numbers in ways that deserve a closer look. Inside the record weekend Combo contracts accounted for approximately 70% of total volume on both days. That works out to about $2.80 billion on Saturday and about $2.75 billion on Sunday. Much of Kalshi’s parlay volume came from long-shot combinations priced below 1 cent. Notional volume counts the full potential payout value of a contract, not the cash a trader actually puts at risk. A trader buying a sub-penny parlay might commit very little money while generating a large notional figure. The real risk absorbed by traders on these combo trades is considerably lower than the $3.96 billion headline suggests. Zoom out to the full week and t...