Prediction market data discovery tools for researchers, reporters, and analysts.

TickerTracker retweeted
Replying to @TickerTracker_
Nah, Kalshi has a fee accumulator to prevent rounding-up from costing you more than 1c per market. So it's maybe losing $26.13/day not $432/day. Likely just someone farming volume for a higher rate limit tier if I had to guess!
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TickerTracker retweeted
Kalshi did $15.3 billion in notional volume last week. About 60% -- or $9.1 billion -- of that volume was on parlays, which are almost entirely based on sports events. My read is it's going to be increasingly difficult to frame this as non-gambling activity. Data per @TickerTracker_
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It was a gigantic weekend for prediction markets, with total contract volume reaching $7.64 billion for Saturday and Sunday combined across tracked platforms. That's up 20% from $6.34 billion last weekend.
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Note: Underdog's numbers include only its native volume via Underdog Exchange. Its total platform volume for the weekend (including trades routed through other exchanges) was $182 million, putting it ahead of Novig on the leaderboard. data.underdogexchange.com/
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Kalshi had more than $3 billion(!) in single-day contract volume for the first time on Saturday, beating its own record for the fourth time this month.
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Saturday was also a record day of volume for: - Polymarket US ($440M) - CDNA ($130M) - Novig ($87.5M) - ProphetX ($13.6M) Underdog also had a platform record at $96.1M, but only about half of that was routed through Underdog Exchange.
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The past two days were Kalshi's two biggest trading days of all time, with a combined $4.9 billion in contract volume. Cowboys/Giants on SNF was bigger than any regular-season game last year.
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Combos accounted for ~60% of the weekend's trading volume across all platforms:
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Kalshi alone recorded just under $3 billion in combos volume for Saturday and Sunday combined. - 56% of combo contracts included a football leg - Four NFL games appeared in more than $1B of combos - Player props made up 44% of Sunday's combo legs
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Still waiting for Polymarket US data for Sunday, hence its exclusion. Will update if/when the numbers come in.
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RT @DustinGouker: Some Saturday prediction market data from @TickerTracker_ : Kalshi: $2.4 billion in volume, new daily record. $1.5 billi…
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For the second straight week, Saturday was a record day of trading volume for Kalshi. - More than $700M in sports (30%) - Almost $1.5B in combos (61%)
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Our second screen for the day 👀 Live scores and trading volume in the Sports Hub. ticker-tracker.com/sports
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NFL trading was lighter for the less-competitive SF/LAR game on Thursday night, around $97 million. Moneyline trades were < half of the total game volume.
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TickerTracker retweeted
Six months ago, Kalshi told us sports would be a small piece of the pie very soon. As football season begins, it's still most of the pie. h/t @nickdevor_ tweetering, @Eric_Ramsey & @TickerTracker_ data nexteventhorizon.substack.co…
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Stats for last night's NFL opener on Kalshi: - $105 million in notional volume - Largest regular-season game ever - Fourth-largest NFL game ever - Moneyline was 56% of overall volume - Anytime TD prop > Game Total market
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TickerTracker retweeted
Saturday was the most-bet day in Kalshi history, with a record $2.3B in notional trading volume. Nearly 60% came from parlays. Just 7 days in, September 2026 already ranks Top 7 all-time in monthly volume, per @TickerTracker_.
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Saturday was another record day of volume for Kalshi, the first of many this football season. 🏈
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