ADD TO CALENDAR: September 25th 
DraftKings Falls 7.6%: Is Kalshi's NFL Lead Really That Big?Written by Chris Markoch on September 24, 2026 
Key Points
- DraftKings shares fell 7.6% after Needham data showed Kalshi captured 76% of NFL Week One prediction market volume versus DraftKings' DKeX at about 3%.
- When adjusted to consumer-equivalent handle, Kalshi's share drops to 67%, and its Week One activity does not dwarf DraftKings' existing sportsbook franchise.
- Kalshi faces growing legal risk after Ninth Circuit rulings suggesting its sports contracts may violate gaming law, while DraftKings holds licenses across dozens of states.
- Special Report: Get this “Fed ticker” before September 16
DraftKings Inc. (NASDAQ: DKNG) shares fell 7.6% on Sept. 17 after data from the first week of the National Football League season was released. Needham cited that the prediction market platform, Kalshi, captured 76% of NFL Week One prediction market volume. That was in sharp contrast to DraftKings's own prediction market exchange, DKeX, which took approximately 3%. That data helps explain why DKNG is down over 39% in 2026 and over 51% in the last 12 months. Sports betting was supposed to be a tailwind, but the emergence of prediction markets has turned out to be the black swan many sports betting platforms didn't see coming or didn't take seriously enough. However, it's important for investors to understand what that headline number from Needham is actually measuring. It counts exchange trading volume, not sportsbook handle. Those two figures aren't comparable on a dollar-for-dollar basis. When Needham converted the data to a consumer-equivalent basis, Kalshi's share dropped nine points. That doesn't let DraftKings off the hook. Still, the sell-off priced in a lopsided outcome that the underlying data doesn't fully support. DraftKings' exchange is only months old, and Kalshi's legal footing got shakier the same week the data was released.
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What the 76% Figure Actually MeasuresNeedham tracked $14.6 billion of sports and parlay prediction-market volume across eight exchanges in Week One. That matched the first 14 weeks of the 2025 NFL season combined. Kalshi accounted for about three-quarters of it. The distinction is how exchange volume gets counted. A prediction contract can change hands more than once. Every trade adds to the reported volume. A sportsbook bet, by contrast, counts once, when the customer places it. Professional traders amplify the effect. They post bids and offers constantly and rebalance as prices move. That churn inflates notional volume without adding new customer dollars. DraftKings estimates 80% to 90% of sports prediction volume in sportsbook states comes from professional syndicates and institutional traders. On an Adjusted Basis, the Gap NarrowsNeedham estimated $2.1 billion of consumer-equivalent handle, which cut Kalshi's share to 67%. DKeX stayed at nearly 3%. That's still a dominant position for Kalshi. But the smaller denominator changes the scale of the threat. However, understanding the scale requires context about DraftKings' core business. In Q2 2026, the company's combined Sports Consumer Volume, covering sportsbook bets and prediction contracts, was $13.1 billion. That quarter had no NFL games. Spread evenly, it works out to roughly $1 billion per week. Kalshi's adjusted Week One activity comes to about $1.4 billion. That's meaningful competition, but it isn't a number that dwarfs DraftKings' existing franchise. Needham also flagged a blind spot. The firm cautioned that the data may understate DraftKings, because some customer flow reaches exchanges run by other companies. CEO Jason Robins has said DraftKings markets are live on three trading exchanges.
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DKeX Is Months Old, Not YearsTiming matters as well. DraftKings launched Predictions in December 2025 in 38 states and has since expanded to 48. Its proprietary exchange, DKeX, launched June 26. The early growth curve is steep. Annualized prediction volume rose from $2.3 billion in April to $11 billion in July. More than 600,000 customers used the product this year, and adoption beat internal expectations. But the market leader isn't standing still. Kalshi now undercuts the sportsbooks on price, a reversal from a year ago. Data from Citizens found Kalshi's Week One implied vig (i.e., profit) was 4.32%, below FanDuel's 4.44% and DraftKings' 4.51%. Last season, Kalshi's vig ran 30 to 40 basis points higher than both sportsbooks. The sportsbooks held their edge where margins are richest, however. Kalshi's implied vig on combined favorite-and-over bets reached 23.8%, compared with 22% at DraftKings and FanDuel, which is owned by Flutter Entertainment (NYSE: FLUT). Stifel also highlighted DraftKings' parlay strengths. Citizens' customer wallet analysis also found that cannibalization of regulated sports betting is not worsening and may be easing. Kalshi's Legal Risk Is GrowingThere's another factor to consider, which is Kalshi's legal overhang. On Sept. 16, the Ninth Circuit held that two California tribes are likely to succeed in claiming Kalshi's sports contracts violate federal Indian gaming law. That was two days before the sell-off. The court held that a wager occurs where the bettor stands, not where the exchange's servers sit. That reasoning gives any tribe with a gaming ordinance a path to federal court. That verdict came on the heels of the Ninth Circuit ruling in August that held sports event contracts likely constitute bets, and that federal commodities law doesn't preempt Nevada's regulation. Kalshi's CEO has acknowledged the uncertainty. Tarek Mansour said the August ruling "added more legal uncertainty than there was before." DraftKings isn't immune, since it runs a prediction product too. But it also holds sportsbook licenses across dozens of states. If courts push prediction markets under gaming law, a licensed operator is better positioned than a pure exchange. Is DraftKings Stock a Buy After the Kalshi Sell-Off?None of the noise surrounding this headline changes the fact that perception is often reality when it comes to the short-term fortunes of a stock. The DKNG chart shows a stock that trades well below its 200-day moving average near $26.24. The MACD sits in negative territory. Shares were already down nearly 40% for 2026 before the latest leg lower. Bears have real points. DKeX's share held near 3% on both measures. Kalshi prices single-game contracts more cheaply. It's unclear how DraftKings will hold up in the prediction market space. For all of the headwinds, analysts remain bullish on DKNG. The consensus price target of $34.36 implies an upside of about 62%. Investors only have to look at the earnings outlook to understand why. Analysts are forecasting earnings growth of over 146% in the next 12 months. That's not being priced into the stock. Yet the sell-off rested on a figure that overstated Kalshi's grip. Adjusted, the lead is smaller. DraftKings' exchange is in its first football season. And Kalshi faces courts that increasingly call its product gambling. Investors who sold on the 76% headline priced in a finished race. The data suggests it has barely started. Read this article online › Featured Articles
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