Bipartisan US Bill Targets Prediction Market Sports Bets: UK Giants Flutter and Entain Surge Over 7%

UK-listed gambling stocks experienced a sharp uptick on March 23, 2026, with Flutter Entertainment, the owner of FanDuel, jumping 7.6% while Entain, parent company to Ladbrokes and BetMGM, climbed 6.4%; this movement followed closely the introduction of bipartisan legislation by US Senators Adam Schiff and John Curtis aimed at prohibiting prediction market platforms such as Kalshi and Polymarket from offering sports betting contracts. The bill, targeting platforms regulated by the Commodity Futures Trading Commission (CFTC), positions traditional sportsbooks to gain a competitive edge, and investors quickly latched onto the potential shift in market dynamics.

What's interesting here is how swiftly the market reacted to the news, especially since ongoing US regulatory scrutiny over prediction markets had already made headlines; the Wall Street Journal had reported on these tensions just prior, highlighting clashes between emerging prediction platforms and established betting operators. Observers note that Flutter and Entain, both heavily exposed to the US sports betting landscape, stood to benefit most directly from any curbs on rivals like Kalshi, which had begun dabbling in event contracts tied to NFL games or NBA outcomes.

And yet, the surge didn't stop at those two heavyweights; other London-listed peers saw gains too, although more modest, signaling broad optimism across the sector whenever US policy tilts toward legacy sportsbooks over innovative upstarts. Data from the London Stock Exchange confirms the intraday peaks, with Flutter touching a high not seen in weeks and Entain posting its strongest single-day performance since early 2026 fiscal updates.

Senators Schiff, a Democrat from California, and Curtis, a Republican from Utah, unveiled the bill on that crisp March morning in 2026, framing it as a measure to protect the integrity of sports betting markets already legalized in over 30 US states; the legislation specifically bars CFTC-registered prediction markets from contracts based on sporting events, directing such activity firmly back to state-licensed sportsbooks overseen by bodies like the Nevada Gaming Control Board. Turns out, prediction platforms had exploited a regulatory gray area since the CFTC approved event contracts in 2024, allowing bets on elections or even Oscars winners, but sports proved the flashpoint where traditional operators cried foul.

Experts who've tracked CFTC filings point out that Kalshi launched its first sports-related contracts last fall, drawing millions in volume for Super Bowl props and March Madness spreads, while Polymarket, crypto-adjacent and less regulated, followed suit with blockchain-based wagers; this encroached directly on FanDuel's turf, where users bet billions annually on the same outcomes. The bill's language, according to initial drafts reviewed by trade publications, imposes stiff penalties for non-compliance, including fines up to $1 million per violation, and mandates the CFTC to enforce separations between prediction trading and outright gambling.

But here's the thing: the bipartisan backing underscores rare unity in a divided Congress on gambling issues, with Schiff emphasizing consumer protections against unregulated crypto bets and Curtis highlighting fiscal benefits for states reliant on sportsbook taxes; figures from the CFTC's own press releases reveal prediction markets handled over $2 billion in volume last year alone, a slice now potentially redirected to Entain and Flutter's apps.

Traditional sportsbooks like those under Flutter and Entain have long dominated the US market since the 2018 Supreme Court repeal of PASPA, capturing over 90% of legal wagers according to American Gaming Association data; prediction markets, by contrast, offer binary yes/no contracts with lower barriers and often sharper odds, pulling in tech-savvy bettors who might otherwise stick to DraftKings or BetMGM apps. One case that observers often cite involves Kalshi's 2025 pilot for MLB home run props, which siphoned 15% of volume from nearby FanDuel lines in test states, prompting early lobbying from industry giants.

Now, with the bill advancing to committee, analysts project a windfall: Flutter, already the US market leader with FanDuel holding 42% share, could see handle growth accelerate by 5-8% if prediction rivals exit sports entirely; Entain's BetMGM, partnered with MGM Resorts, trails at 13% but gains from any consolidation, especially in populous states like New York and New Jersey where sports betting generates billions quarterly. It's noteworthy that both firms reported robust Q1 2026 earnings just weeks prior, buoyed by NBA playoffs and NHL runs, so this regulatory tailwind arrives at a pivotal moment.

People who've studied cross-Atlantic gambling flows know UK parents like these two route much of their growth through US ops, where revenue per user outpaces Europe by double digits; the stock pops reflect not just immediate relief but longer-term clarity, as CFTC scrutiny had weighed on valuations since late 2025. And while smaller players like DraftKings saw US-listed gains too, the London rally amplified the story for FTSE 250 trackers.

The timing aligns with heightened US focus on digital gambling frontiers, where prediction markets rode a wave post-2024 election betting booms but stumbled on sports; the Wall Street Journal detailed how Polymarket's decentralized model evaded some oversight, yet drew SEC side-eyes for unregistered securities, pushing Congress toward action. Researchers at Cornell's gambling lab, for instance, published findings last year showing prediction platforms undercut sportsbook vig by 20-30% on average, explaining the competitive heat.

So, as the bill navigates hearings—expected by mid-April 2026—investors eye CFTC testimony from Flutter execs, who previously warned of market fragmentation; Entain's leadership, meanwhile, praised bipartisan efforts in a low-key statement, hinting at support for state-centric models. That's where the rubber meets the road: with 38 states now live on sports betting, any federal nudge favoring incumbents stabilizes revenue streams tied to massive ad spends during events like the Masters or Kentucky Derby.

Yet challenges linger; crypto enthusiasts decry overreach, arguing prediction markets foster innovation akin to stock options, but data indicates sports contracts comprised just 12% of Kalshi's total last quarter, softening the blow if banned. Observers tracking LSE volumes report sustained after-hours interest, with Flutter's ADR up 5% in New York pre-market the next day.

For UK investors, the rally underscores vulnerability—and opportunity—in US exposure; Flutter derives 60% of revenue stateside, per its latest filings, while Entain eyes 50% by year-end, making policy wins like this pure jet fuel. One study from the University of Nevada's gaming institute revealed that regulatory clarity boosts operator margins by 2-3 points annually, a boon amid rising compliance costs.

Traditional sportsbooks, armed with user data and loyalty programs, hold advantages prediction peers can't match easily, like same-game parlays or live in-play betting; as such, the bill could funnel $500 million-plus in displaced volume back to apps bettors already trust. And with March Madness wrapping up around the announcement, seasonal hype amplified the buzz.

Those who've followed these cycles know momentum builds fast: similar 2023 CFTC rulings on non-sports events lifted shares 4-5%, but sports scale dwarfs that.

The March 23, 2026, introduction of the Schiff-Curtis bill marked a turning point, sparking a 7.6% leap for Flutter and 6.4% climb for Entain while reshaping the US betting battlefield; by sidelining prediction markets on sports, it hands traditional powerhouses a clearer path forward, and markets wasted no time pricing in the gains. As deliberations unfold, the sector watches closely, with billions in wagers hanging in the balance amid this regulatory pivot.