UK Gambling Stocks Surge as US Senators Introduce Bill to Block Prediction Markets from Sports Betting

UK Gambling Stocks Surge as US Senators Introduce Bill to Block Prediction Markets from Sports Betting

The Market Reaction on March 23, 2026

On March 23, 2026, shares of major UK-listed gambling companies climbed sharply on the London Stock Exchange after bipartisan legislation emerged in the US, targeting prediction market platforms; Flutter Entertainment, the parent of FanDuel, jumped 7.6 percent, while Entain, which owns Ladbrokes and holds a stake in BetMGM, rose 6.4 percent, according to reports from Investing.com.

That surge caught observers' attention because traditional sportsbooks had faced stiff competition from these newer platforms, which operate under federal oversight from the Commodity Futures Trading Commission (CFTC) rather than state gambling licenses; prediction markets like Kalshi and Polymarket allow users to trade yes/no contracts on event outcomes—including sports results—and they've drawn massive volumes without the same regulatory hurdles as state-licensed books.

Flutter's gains stood out particularly, given FanDuel's dominant position in the US sports betting landscape post-2018 PASPA repeal, where it commands significant market share alongside DraftKings; Entain's uptick reflected similar relief, as BetMGM—its joint venture with MGM Resorts—competes head-on in states like New Jersey and Michigan, where prediction markets have siphoned bets on NFL games, NBA matchups, and more.

Details of the Bipartisan Bill from Schiff and Curtis

Senators Adam Schiff, a Democrat from California, and John Curtis, a Republican from Utah, introduced the legislation to explicitly prohibit CFTC-regulated prediction markets from offering sports betting contracts, aiming to channel activity back to licensed operators; the bill targets platforms that have expanded into sports without state-by-state approvals, a move that lawmakers argue undermines consumer protections and tax revenues funneled to states.

According to details released on that date, the proposal builds on existing CFTC rules for event contracts while carving out sports events as off-limits, recognizing how Kalshi alone reported sports-related trading comprising roughly 90 percent of its overall volume; Polymarket, known for political and crypto bets, has similarly dipped into sports amid booming interest, especially during high-profile events like the Super Bowl or March Madness.

Schiff's office highlighted the need to protect the integrity of sports wagering, which generates billions in state taxes annually—figures from the American Action Forum, a nonpartisan policy institute, show licensed sportsbooks contributed over $4 billion in direct taxes across 38 states in 2025 alone, whereas prediction markets bypass those streams.

But here's the thing: prediction markets trade binary outcomes as financial instruments, not outright wagers, which lets them skirt gambling laws; users buy "yes" or "no" shares on, say, "Will the Chiefs beat the Eagles by more than 3 points?" and settle based on results, attracting traders who view it as efficient pricing rather than pure betting.

Why Prediction Markets Posed a Threat to Traditional Operators

Traditional sportsbooks like FanDuel and BetMGM rely on state licenses, which demand hefty fees, age verification, responsible gambling tools, and geofencing; prediction platforms, regulated federally by the CFTC, face lighter touch oversight focused on market manipulation rather than addiction safeguards, allowing them to offer odds on events nationwide without per-state approval.

Kalshi's growth exemplifies this: since gaining CFTC approval for event contracts in 2024, it ramped up sports offerings, capturing bets on MLB World Series outcomes, UFC fights, and even niche college basketball spreads; data from the platform's quarterly reports indicate sports now dominate, with daily volumes hitting millions during playoffs, pulling users who might otherwise stick to apps from DraftKings or Caesars.

Entain executives have noted in past earnings calls how such competition erodes margins, especially since prediction markets often feature lower vig—around 1-2 percent versus 5-10 percent on sportsbooks—making them appealing to sharp bettors; Flutter, too, has lobbied for parity, arguing that unlicensed federal platforms distort the market where states control 70 percent of US handle as per recent USA Today coverage on industry lobbying. Wait, no—that's not accurate; actually, observers track lobbying disclosures showing both companies spent millions advocating for restrictions on non-state platforms.

One case that highlights the friction involves Kalshi's November 2025 push into NFL props, where trading volume spiked 300 percent week-over-week, coinciding with a dip in FanDuel's same-game parlay handle; researchers at the University of Nevada's International Gaming Institute documented similar shifts, noting how prediction markets' 24/7 accessibility and crypto integration lure younger demographics away from traditional apps.

Company Profiles: Flutter and Entain in Focus

Flutter Entertainment, headquartered in Dublin but London-listed, oversees a portfolio including FanDuel in the US, Paddy Power and Betfair in the UK, and PokerStars globally; its US arm leads with 42 percent market share in online sports betting as of Q4 2025, bolstered by New York and Illinois dominance where monthly handle exceeds $2 billion combined.

Entain, formerly GVC Holdings, operates Ladbrokes Coral in the UK—Britain's largest retail chain—and partners with MGM for BetMGM, which ranks third in the US behind FanDuel and DraftKings; the firm's 50/50 JV with MGM reported $2.5 billion in 2025 revenue, yet executives flagged prediction market encroachment during February analyst briefings, citing lost volume on high-margin props.

That March 23 surge extended beyond these two: DraftKings, though US-listed, saw after-hours gains, while smaller players like Playtech ticked up 4 percent; the FTSE gambling index rose 5.2 percent overall, reflecting broad relief across the sector where prediction markets had chipped away at a $150 billion US handle pie, per Eilers & Krejcik Gaming data.

What's interesting here is the cross-Atlantic dynamic: UK firms with heavy US exposure benefit most from Washington clamping down, since domestic markets like Britain's remain stable under strict regulations; Flutter derives 55 percent of revenue from North America, Entain around 40 percent, so any edge against disruptors like Kalshi translates directly to bottom lines.

Broader Context of Prediction Markets vs. Sports Betting Regulation

The CFTC has grappled with event contracts since 2020, approving Kalshi's model after court battles but facing pushback from sports leagues and states; the NBA and NFL have testified before Congress on risks of unregulated betting eroding game integrity, while platforms counter that their markets aggregate information better than odds from sportsbooks prone to sharp action limits.

Polymarket's trajectory mirrors this: starting with elections, it pivoted to sports amid 2024 crypto bull runs, offering contracts on Olympics medal counts and Premier League winners; yet volumes pale next to Kalshi's sports focus, where March 2026 NCAA tournament bets alone topped $50 million settled.

States like New Jersey, home to BetMGM's headquarters, collect 15-20 percent tax on gross gaming revenue, funding education and infrastructure; prediction markets contribute federally via CFTC fees but zero to states, prompting governors from both parties to back Schiff-Curtis, as evidenced by a March 22 letter from the National Council of Legislators from Gaming States.

And while the bill's passage remains uncertain—needing House approval and presidential sign-off—its introduction alone sparked the rally, signaling momentum; past efforts, like 2024's Lummis-Gillibrand crypto bill tweaks, show bipartisan consensus on ring-fencing gambling from derivatives.

Potential Implications for Investors and Operators

Should the legislation advance, traditional operators stand to reclaim volume, especially on props and futures where prediction markets excel; FanDuel's supercontest-style contests and BetMGM's MGM Rewards loyalty could lure back users seeking familiar interfaces over decentralized alternatives.

Investors watched closely, with Flutter's market cap climbing £3.2 billion that day, Entain adding £1.1 billion; analysts at Jefferies upgraded both to "buy," citing reduced competitive overhang, though skeptics note Kalshi could pivot to non-sports events like weather or economic indicators.

People in the industry often point out that enforcement matters: CFTC fines for violations hit $10 million in a 2025 case against an unauthorized platform, underscoring regulators' willingness to act; for UK-listed firms, this US clarity boosts confidence amid global consolidation, where Flutter's $20 billion Paddy Power Betfair merger still echoes.

Wrapping Up the March 23 Developments

The stock surges for Flutter and Entain on March 23, 2026, underscore how quickly US policy shifts ripple through global gambling markets, particularly as Senators Schiff and Curtis' bill spotlights prediction platforms' sports betting inroads; with Kalshi's 90 percent sports reliance exposed, traditional operators like FanDuel and BetMGM gear up for potential advantages, while investors eye legislative progress that could reshape a trillion-dollar industry blending finance, tech, and wagering.

Turns out, in this fast-moving space, one bill's introduction can flip sentiment overnight, handing UK-listed giants a timely boost amid ongoing battles for market share.