Kalshi Hits $3.9 Billion in Trading Volume as Parlays Dominate Weekend Activity
Parlays power record Kalshi trading days
Parlay-style combo contracts made up roughly 70% of Kalshi's notional trading volume as the prediction market exchange hit daily totals of about $3.91 billion on October 10 and $3.96 billion on October 11, according to an analysis by Bitcoin.com of the platform's trading data.
Kalshi, a regulated prediction market where traders bet on real-world outcomes, has seen surging activity driven largely by combos that bundle multiple events into a single position.
Key numbers from the analysis
- Oct. 10: combos supplied $2.80 billion, or 71.6% of the $3.91 billion total.
- Oct. 11: combos supplied $2.75 billion, or 69.4% of the $3.96 billion total.
- Oct. 4 turnover was $3.68 billion, and combos accounted for $218 million of the $279 million increase seen the following day.
How Kalshi counts and calculates volume
Notional volume values contracts at their maximum payout amount, not the price actually paid by buyers. That means a low-priced contract can add as much notional turnover as a higher-priced one, even though the buyer spent less money.
Kalshi's documentation states that a pair of Yes and No positions counts as a single contract rather than two separate ones. The reported turnover therefore measures contracts traded, not opposing sides counted twice.
What combos are and how they work
Combos are custom combinations of events that traders can buy as a single position, according to Kalshi's own documentation. Each combination operates as its own market, with prices obtained through requests for quotes from other participants. The maximum payout is $1 per contract.
Under Kalshi's rules, a combo pays $1 only if every underlying position in the combination settles at $1. If any position settles at zero, the entire combo pays zero. Partial settlements can produce a payout somewhere between those two extremes.
What the data does not show
Notional volume is not the same as cash spent by buyers, and the figures do not measure new user growth. Readers tracking prediction market expansion should keep that distinction in mind when evaluating the headline numbers.
Sources
Newisty Editorial Team covers technology, cryptocurrency, digital products, online platforms, developer tools and the wider digital economy. Our content is researched from official sources, company announcements, public documentation, market data and other primary or reputable sources. Articles are reviewed and edited before publication for clarity, accuracy and useful context.