Key Takeaways Kalshi’s notional volume reached a record $3.91 billion on Saturday and $3.96 billion on Sunday. Combos made up 71.6% of Saturday’s volume and 69.4% of Sunday’s, and most of the weekly growth. Combos Supplied Most of the Growth Kalshi’s daily market data, which runs on U.S. Eastern days, shows $3.91 billion in notional volume on Saturday, Oct. 10, and $3.96 billion on Sunday, Oct. 11, both above the previous high of $3.68 billion set on Sunday, Oct. 4. Notional volume counts each contract at its full $1 payout, which the buyer and seller fund between them according to …