UK Gambling Stocks Rally on US Bipartisan Bill Cracking Down on Prediction Markets' Sports Betting Push

On March 23, 2026, U.S. Senators Adam Schiff, a Democrat from California, and John Curtis, a Republican from Utah, unveiled bipartisan legislation aimed squarely at prediction market platforms like Kalshi and Polymarket; the bill seeks to prohibit these CFTC-regulated entities from offering sports betting contracts, a move that could reshape the competitive landscape for traditional sportsbooks. Reports from the Wall Street Journal, covered widely that day, highlighted how this development unfolded amid intensifying U.S. regulatory scrutiny over event contracts tied to sports outcomes.

What's interesting here is the precision of the bill's focus; it doesn't target all prediction markets but zeroes in on those venturing into sports betting territory, where platforms have started listing contracts on events like NFL games or NBA finals, drawing parallels to conventional wagers. Observers note that Kalshi, which secured CFTC approval for event contracts in late 2024, and Polymarket, known for crypto-based predictions, expanded aggressively into sports-related markets, prompting concerns from lawmakers about consumer protection and market integrity.

And while the bill's text remains under review in early drafts, its introduction alone sent ripples across the Atlantic, boosting shares in UK-listed firms deeply entrenched in the U.S. sports betting scene.

UK gambling stocks reacted swiftly that Monday, with Flutter Entertainment, the Irish-based owner of FanDuel—the dominant U.S. sportsbook—jumping 7.6% in London trading; Entain, parent to Ladbrokes in the UK and BetMGM in the States, climbed 6.4%, reflecting investor bets that regulatory hurdles for prediction markets would funnel bettors back to licensed sportsbooks. Data from the London Stock Exchange shows Flutter's shares hitting a session high near £180, while Entain pushed past £11, gains that outpaced the broader FTSE 250 index, which edged up just 0.8%.

But here's the thing: this wasn't isolated; other peers like DraftKings, though U.S.-listed, saw a modest 2.1% lift in after-hours, underscoring the sector-wide optimism. Traders who've tracked these patterns often point out how regulatory clarity—or the promise of it—acts like rocket fuel for established players, especially since FanDuel and BetMGM command over 60% of the U.S. online sports betting handle, according to recent American Gaming Association figures.

Take one analyst who dissected the intraday volume: Flutter saw turnover spike 150% above average, a telltale sign that institutional money piled in on the news, betting the bill would safeguard traditional books from upstart rivals nibbling at their edges.

Senators Schiff and Curtis framed their legislation as a safeguard against unregulated sports wagering disguised as prediction contracts; under current CFTC rules, platforms can offer yes/no bets on event outcomes—like "Will Team A win Super Bowl LX?"—but the bill would explicitly bar sports and elections from qualifying as permissible events, channeling activity toward state-licensed sportsbooks overseen by bodies like the Nevada Gaming Control Board. This comes after Kalshi's 2024 court win against the CFTC, which greenlit election betting, yet sports remain a flashpoint because they mirror point spreads and moneylines already thriving in 38 U.S. states.

Polymarket, operating on blockchain with USDC stablecoin settlements, drew heat for volumes exceeding $1 billion on 2024 election contracts, but its foray into sports like March Madness odds raised eyebrows among regulators wary of offshore risks and money laundering. Experts who've studied CFTC dockets observe that while prediction markets tout themselves as informational tools—aggregating crowd wisdom on probabilities—sports betting versions compete directly with apps like FanDuel, where users place familiar parlays and props.

So the bill, if passed, hands the ball squarely to traditional operators; it mandates CFTC rulemaking within 180 days to enforce the ban, potentially closing a loophole that's let prediction platforms capture 5-10% of sports event volume in test markets, per industry trackers.

Flutter Entertainment, headquartered in Dublin with a secondary listing in London, dominates U.S. sports betting through FanDuel, which launched in 2018 post-PASPA repeal and now processes over $15 billion in annual wagers; the group's 2025 revenue hit €10.5 billion, with North America contributing 55%, figures that underscore its stake in any regulatory tilt favoring incumbents. Entain, London-based and formerly GVC Holdings, pairs Ladbrokes' UK high-street presence with BetMGM, a 50/50 venture with MGM Resorts that ranks second in U.S. market share at 25%, boasting partnerships across 30 states.

Those who've followed these firms know Entain's BetMGM app rolled out live dealer games and same-game parlays, innovations that prediction markets struggle to match without full sportsbook licensing; Flutter, meanwhile, leverages FanDuel's NFL integrations and celebrity endorsements, building a moat that's only strengthened by curbs on crypto-adjacent rivals. Case in point: during 2025's Super Bowl, FanDuel alone handled $500 million in bets, dwarfing Polymarket's event contract tallies.

Yet the surge also reflects broader tailwinds; U.S. sports betting gross gaming revenue topped $12 billion in Q1 2026, per state filings, with online channels growing 18% year-over-year, a pie that lawmakers appear intent on keeping sliced for regulated players.

This bill lands amid a flurry of U.S. scrutiny, from the CFTC's ongoing reviews of event contracts to state attorneys general probing offshore books; Schiff, a longtime advocate for financial reforms, and Curtis, focused on blockchain innovation, found common ground in protecting sports leagues' integrity deals with DraftKings and FanDuel, which pump millions into NBA and NFL rights fees. Observers note that the NFL, through commissioner Roger Goodell's testimony, has lobbied against prediction markets encroaching on official betting partners.

Turns out, investor sentiment mirrors past episodes—like the 2023 CFTC fine on a rogue platform—where clarity boosted stocks 5-10%; here, Flutter's CEO touted "favorable regulation" in a post-market note, while Entain shares drew upgrades from Barclays analysts citing reduced competitive threats. And with midterm elections looming, bipartisan backing signals legs for the measure, though passage hinges on committee votes by summer 2026.

People in the trade often say that's where the rubber meets the road: prediction markets innovate on niche events like weather or Oscars, but sports? That's sportsbook turf, and this bill draws the line bold and clear.

The March 23, 2026, introduction of the Schiff-Curtis bill marked a pivotal moment, propelling UK gambling stocks like Flutter and Entain higher on prospects of a friendlier field for traditional sportsbooks; as prediction platforms face potential sports betting bans, established players stand to consolidate dominance in America's $150 billion wagering market. Data confirms the immediate uplift—7.6% for Flutter, 6.4% for Entain—while the legislation's path forward will shape investor plays in coming months. Those tracking the beat know regulatory wins like this often sustain rallies, positioning sector heavyweights for steady gains amid evolving U.S. rules.