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TL;DR
- Kalshi's NFL Week 1 volume more than doubled year over year, from $441 million in 2025 to $983 million in 2026, helping push the platform to back-to-back daily volume records over opening weekend.
- The Kalshi jurisdiction fight has grown from two circuits to four: the Third Circuit sided with Kalshi in New Jersey's case, the Ninth Circuit and Tenth Circuit have both since sided with states, and a Sixth Circuit ruling is still pending.
- Two Supreme Court petitions are now on file, one from each side, plus Kalshi's own request for a Ninth Circuit rehearing.
- None of that changes the actual question bettors should be asking: is the number in front of you driven by real information, or by where the crowd's money happens to be sitting.
The season kicked off, and prediction markets broke records right along with it
We wrote back in June that prediction markets and sportsbooks looked headed for a real collision. NFL Week 1 is the first real data point, and it's a significant one.
Kalshi's NFL markets did $983 million in Week 1 trading this year, more than double the $441 million it handled in the first four days of the 2025 NFL season. That growth helped drive the platform to back-to-back daily volume records over opening weekend: $2.426 billion on Saturday, $2.433 billion on Sunday, its two best single days ever. Combined, Kalshi and Polymarket did $14.1 billion in sector-wide volume that week, up 9.3% from the week before, and Kalshi is on pace for 53.4% month-over-month growth in September.
Worth being precise here: the daily and monthly totals are platform-wide, not NFL-only, so treat them as evidence of overall momentum rather than a clean NFL-specific number. Opening weekend clearly did a lot of the driving, though.
The legal fight just got a lot more complilcated
We covered the early rounds of the Kalshi jurisdiction fight in our legal-updates post. Since then, the field has gotten crowded fast. What was a two-circuit split in August, the Third Circuit backing Kalshi against New Jersey in April, the Ninth Circuit backing Nevada in late August, is now a four-circuit split: the Tenth Circuit has since sided with Utah against Kalshi, and a Sixth Circuit ruling is still pending.
Both sides are now racing to the Supreme Court at the same time. Per that same reporting, Robinhood filed a cert petition on the Nevada case; New Jersey filed its own petition days earlier, asking the Court to overturn the ruling that favored Kalshi. Kalshi is separately asking the full Ninth Circuit to rehear its case. "Pending regulatory resolution" doesn't really cover this anymore; it's an active, expanding fight, and which way it lands nationally is genuinely uncertain.
Where this leaves bettors, and where Moddy fits
Whether you're placing a bet at a sportsbook or trading a contract on Kalshi or Polymarket, the underlying question doesn't change: is the number in front of you driven by real information, or by where the crowd's money happens to be sitting. Record volume doesn't answer that question, it just means more people are asking it, on more platforms, with more money behind it.
That's the exact gap Rundown and Read are built to close, regardless of which side of the sportsbook-versus-prediction-market line you're on.
