Needham & Company data published this week cut Kalshi's headline lead in NFL prediction markets from 76% to 67%, once the repeated churn of professional traders is stripped out of the volume figures. The reframing matters because that raw 76% is part of the case for Kalshi's roughly $40 billion valuation and for the wider claim that prediction markets are eating into the incumbent gaming operators, and it sent shares of DraftKings, Robinhood and Flutter Entertainment lower again.
Needham, a US investment bank, tracked prediction-market activity across eight exchanges during the opening week of the NFL season. On raw volume the picture was lopsided: about $14.6 billion in notional volume changed hands, and Kalshi, the CFTC-regulated US exchange, accounted for 76% of it. DraftKings, the listed US gaming operator that launched its own exchange, DKeX, took roughly 3%. Read that way, one venue owns the season and everyone else is fighting for scraps.
Then Needham changed the denominator.
What "consumer-equivalent handle" actually measures
A prediction market is a market, not a betting slip. A trader can open a position on a game and close it minutes later, open it again, hedge it, and unwind the hedge, all before kickoff. Every one of those actions adds to notional volume, but none of it is new money from a new customer. Notional volume counts contract flow; it does not count how many real dollars real consumers committed to the outcome.
"Consumer-equivalent handle" is Needham's attempt to count the second thing. It strips out the repeated open-and-close churn generated by professional and institutional traders and leaves an estimate of what a retail customer base actually put at stake. On that measure the NFL Week 1 total was not $14.6 billion but about $2.1 billion, of which Kalshi held roughly $1.4 billion. That $1.4 billion out of $2.1 billion is where the 67% comes from: the division works out to 66.7%, rounded to 67%.
So the 76% and the 67% are not a correction of an error. They measure two different things: 76% is Kalshi's share of churned contract flow, and 67% is its share of estimated real consumer money. The mistake would be presenting the two as the same number.
DraftKings' argument: mostly pros, not fans
DraftKings has been making a version of this case for months. The company argues that in states where it also runs a licensed sportsbook, 80% to 90% of sports-prediction volume comes from professional syndicates and institutional traders rather than everyday retail customers. If that is close to right, then a large volume number is mostly the same sophisticated money cycling through the system at speed, not a wave of sportsbook customers defecting to exchanges.
That is a self-interested argument, and it should be read as one: DraftKings has every reason to say the prediction-market threat to its core sportsbook is smaller than the raw numbers suggest. But Needham's handle adjustment moves in the same direction, and it comes from an outside analyst rather than a competitor.
The share reaction
The market reaction has come in two waves. On September 17, a Thursday, DraftKings shares fell 7.6% after the first NFL Week 1 volume figures circulated and the raw 76% number did its damage. When Needham's adjusted read appeared on September 25, DraftKings, Robinhood (the brokerage app that now offers prediction-market contracts) and Flutter Entertainment (the parent of FanDuel) all traded lower again, though by smaller single-digit moves on the day.
The context around DraftKings is harder. The share has fallen roughly 38% to 39% across 2026, so the prediction-market story is landing on a company whose shares were already under pressure. Reported same-session prices for DraftKings around September 25 differ between data providers, so the precise close is best treated as unsettled; the direction, lower, is not in dispute.
Why nine points matter for a $40 billion price tag
The gap between 76% and 67% is not academic. Prediction-market valuations have been climbing on volume: Kalshi has been valued at about $40 billion and Polymarket at about $20 billion, and the argument for those numbers leans heavily on the idea that these venues are capturing enormous, fast-growing activity. If a large share of that activity is professional churn rather than a broadening consumer base, the growth story an investor is paying for looks different.
It changes the question from "how much volume runs through the exchange" to "how many real customers does it have, and how much do they commit." Notional volume flatters the first framing; consumer-equivalent handle is an attempt to price the second. Neither number is wrong, but only one of them maps to the durable, monetizable audience an equity investor is underwriting.
DKeX and DraftKings' own position
DraftKings launched DKeX on June 26, 2026, and has since expanded it to 48 states, positioning the product as its answer to the exchange model rather than a defense of the old sportsbook alone. In the company's most recent read, CEO Jason Robins struck an optimistic note: "While still early, we are seeing double-digit share in the markets where we participate."
A 3% share of tracked NFL Week 1 volume and a claim of double-digit share in chosen markets can both be true: DKeX does not operate everywhere Kalshi does, and Robins's figure is scoped to the markets DraftKings has entered. The season is the test. DraftKings' Q3 disclosure should show DKeX's NFL-season volume and user counts, which is the first hard read on whether the 3% and 67% picture holds up once a full slate of games is in.
A regulatory clock in the background
All of this is happening while the legal status of sports prediction markets is unsettled. The US Supreme Court extended Kalshi's deadline to respond to New Jersey's petition to November 9, 2026, a 30-day extension from the original October 8 date, keeping alive a case over whether states can regulate these contracts. An exchange whose product may yet be constrained state by state is a different asset from one whose national footprint is secure, and that uncertainty sits underneath every volume number.
Which number should you trust
Strip the language back and the fight is not really about Kalshi being ahead. It is about which number an investor should anchor to, and the answer Needham's data pushes toward is handle, not notional. For now the honest read is a range: Kalshi leads NFL prediction markets by somewhere between 67% and 76% depending on what you choose to count, and the next figure that will actually resolve it is not another analyst estimate but DraftKings' own season data on DKeX. Until that lands, anyone quoting a single share number is choosing a denominator, not reporting a fact.
