Key Points
- Citizens JMP Securities tracked 28 data points on 11 September and found Kalshi’s implied vig at 4.32%, below FanDuel’s 4.44% and DraftKings’ 4.51%.
- Parlay pricing ran the other way: Kalshi’s combined favourite and over vig reached 23.8%, against 22.0% at both rivals before transaction fees.
- The AGA, on September 4, 2026, estimated that $1.3bn in state gaming tax revenue has been diverted to prediction markets since 2025, a claim Citizens JMP’s separate analysis directly contests.
A year ago, Kalshi was the expensive option. That is no longer true, at least not for the markets where its liquidity runs deepest.
Citizens JMP Securities analysts Jordan Bender and Isabelle Slavin tracked pricing across 28 moneyline and totals data points on Friday, 11 September, the opening week of the 2026 NFL season. Kalshi’s implied vig came in at 4.32%. FanDuel posted 4.44%, DraftKings 4.51%. In NFL Week 1 of the prior season, Citizens’ tracking had Kalshi trailing both sportsbooks by 30 to 40 basis points. The direction has fully reversed on straight moneyline and totals markets.
How the Gap Opened, According to Citizens?
The pricing shift did not arrive with the first kickoff of 2026. Citizens tracked Kalshi’s vig trajectory through college basketball and the FIFA World Cup earlier this year. During the First Four of March Madness, Kalshi was still the most expensive operator, posting an average vig of 4.89% against DraftKings’ 4.57% and FanDuel’s 4.64%. By the later rounds of the tournament, Citizens’ analysis showed Kalshi’s pricing had tightened considerably, drawing closer to its rivals. The World Cup pushed it into parity. NFL Week 1 pushed it ahead.
Citizens attributes this trajectory to rising trading volumes and deepening market participation, with competition among liquidity providers intensifying in parallel. The analysts describe what they see as a self-reinforcing dynamic: tighter spreads pull in more trading activity, which improves liquidity, which tightens spreads further. Worth noting clearly: this is Citizens’ interpretation of the pricing data, not an independently demonstrated causal chain. The underlying Citizens report was not publicly released, and the conclusions are based on their secondary-reported analysis.
Kalshi charged an average fee of $1.62 per 100 contracts across the tracked markets, according to Citizens’ figures as reported. Takers generally paid; market makers often received reduced or waived fees. The tiered structure is designed to pull institutional liquidity in, and by Week 1 pricing, it appears to be functioning on straight markets.
Where Kalshi Still Trails
The moneyline and totals numbers flatter Kalshi’s overall competitive position. Parlay pricing runs in the other direction. According to Citizens’ analysis, Kalshi’s implied vig on combined favourite and over bets reached 23.8% in Week 1, compared with 22.0% at both DraftKings and FanDuel, before transaction fees. That gap is commercially significant, because parlays are where regulated sportsbooks generate the majority of their revenue; at major US operators, multi-leg bets account for more than half of revenue and roughly a quarter of handle.
Kalshi’s same-game parlay feature arrived without prior advertisement, going live only hours before Week 1 kickoffs. It appeared unavailable once games started, and it was not accessible through Robinhood, which accounts for more than half of Kalshi’s volume according to figures cited by Robinhood CEO Vlad Tenev. The liquidity flywheel Citizens describes has clearly not yet reached parlay markets, and until it does, the head-to-head threat to incumbent operators’ core margins stays theoretical.
The AGA and Citizens Are Reading the Same Market Differently
On September 4, 2026, the American Gaming Association published figures estimating that more than $1.3bn in potential state gaming tax revenue has been diverted to prediction markets since 2025. The AGA also estimated that around $5.1bn of Kalshi’s trading volume has come from users aged between 18 and 20, a demographic generally unable to place bets through regulated US sportsbooks. AGA president and CEO Bill Miller called prediction markets “backdoor sports betting,” arguing consumers are placing bets without the protections the regulated market provides.
Citizens JMP’s separate wallet analysis, attributed to their own research rather than independently verified data, reaches a different conclusion. The firm argues that cannibalisation of regulated sports betting by prediction markets is not worsening and may be easing. Citizens contends Kalshi is primarily drawing players who might otherwise have bet offshore, making it complementary to, rather than competitive with, regulated operators. The firm also attributes sportsbook handle pressure to new customer acquisition costs and operational missteps by DraftKings, which controls roughly a third of US wagering, rather than to prediction market competition. Citizens expects regulated sportsbook handle to accelerate in Q4 2026, citing easier year-on-year comparisons and favourable late-2025 sports outcomes; this remains a forward-looking analyst forecast, not a verified outcome.
Whether the 18-to-20-year-old cohort the AGA identifies represents displacement of regulated wagering or an entirely new pool of participants is precisely the factual dispute neither institution has resolved with publicly available primary data.
The Stock Reaction That Put Parlays on the Map
The financial markets’ read on Kalshi’s parlay ambitions predates the 2026 NFL season. When Kalshi launched customisable same-game parlays on September 30, 2025, DraftKings shares dropped as much as 12.1% in the following trading session. Flutter Entertainment, which owns FanDuel, fell as much as 11%. The combined single-day market capitalisation loss across both companies exceeded $7 billion, more than double the impact of Illinois’ shock tax hike in June of that year. The evidence establishes a clear temporal correlation between the Kalshi parlay launch and the sell-off; it does not establish the launch as the sole cause, with Flutter’s exposure to a separate UK gambling tax discussion also noted as a contributing factor.
The market’s underlying concern was straightforward: if Kalshi’s parlay liquidity eventually matched its moneyline performance, the products generating the highest margins at DraftKings and FanDuel would face direct pricing pressure.
DraftKings Names Its Rival in the Ad Break
DraftKings used FanDuel as its main advertising focus for 14 years straight. This situation changed when the 2026 NFL season began. DraftKings started a campaign aimed at Kalshi with an emphasis on withdrawal delays and bad app reviews. This campaign immediately received backlash on social media where people claimed that one of the good things about Kalshi was the withdrawal process, but the most telling thing here is not the creativity of the campaign. It is the fact that DraftKings named a prediction market operator in their commercial at all. According to the statistics gathered by the website Closing Line, there were 270 ads by Kalshi active as of mid-September which is comparable to the sum of DraftKings Predictions and FanDuel Predicts ads.
Expert Analysis
We find Citizens JMP’s liquidity flywheel argument credible on moneyline markets and premature on everything else. The pricing evidence across the March Madness to NFL Week 1 arc genuinely supports the direction of travel. What the report underplays is how narrow the competitive advantage actually is. A 19-basis-point lead over DraftKings on straight markets is meaningful in aggregate, but it is not the kind of structural edge that threatens an operator’s business model. The parlay vig gap is the more revealing number, because it shows exactly where Kalshi’s liquidity depth still falls short. Sportsbooks are not primarily moneyline businesses; they are parlay businesses. Until Kalshi closes the 1.8-percentage-point parlay gap, the pricing story is real but incomplete.
The AGA’s framing, calling prediction markets “backdoor sports betting,” is politically effective and factually selective. Kalshi is designated by the CFTC as a registered contract market, operating under federal oversight. Describing federally regulated activity as a backdoor to anything is a lobbying argument, not a regulatory finding. The $5.1bn figure attributed to 18-to-20-year-olds is striking, but the AGA has not published the methodology behind it, which makes it impossible to verify whether that volume represents bettors displaced from regulated channels or first-time participants who would never have used a licensed sportsbook. We think the honest answer is probably both, in proportions nobody has measured yet. DraftKings running negative ads against Kalshi rather than against FanDuel says more about where the real competitive pressure is coming from than any analyst note produced this season.
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