UK Gambling Stocks Surge on US Bipartisan Bill Aiming to Block Prediction Markets from Sports Betting

On March 23, 2026, UK-listed gambling stocks experienced a notable uptick after U.S. Senators Adam Schiff and John Curtis introduced bipartisan legislation designed to prohibit prediction market platforms such as Kalshi and Polymarket from offering sports betting contracts; this move, targeting platforms regulated by the Commodity Futures Trading Commission (CFTC), sparked immediate market reactions that favored traditional sportsbooks.

Flutter Entertainment, the owner of FanDuel, saw its shares jump 7.6%, while Entain, parent company to Ladbrokes and BetMGM, climbed 6.4%; observers note these gains occurred against a backdrop of ongoing U.S. regulatory scrutiny on emerging betting formats, as reported by the Wall Street Journal.

The Bill's Core Provisions and Sponsors

Senators Schiff, a Democrat from California, and Curtis, a Republican from Utah, unveiled the legislation amid growing concerns over the expansion of prediction markets into sports wagering; the bill specifically aims to amend CFTC regulations, barring these platforms from contracts tied to sports outcomes like NFL games or NBA finals, thereby channeling bettors back toward state-licensed sportsbooks.

What's interesting here is the bipartisan backing, which signals rare consensus in a divided Congress on gambling oversight; experts who've tracked CFTC activities point out that prediction markets, originally for economic events, have ventured into elections and now sports, prompting regulators to draw firmer lines.

Kalshi and Polymarket, both CFTC-approved for certain event contracts, face the most direct hit; take Kalshi, which launched sports markets in late 2025, or Polymarket, known for crypto-based predictions, both now squarely in the crosshairs because their models bypass traditional sportsbook licensing under state laws.

Immediate Impact on London Stock Exchange Listings

The London Stock Exchange felt the ripple effects swiftly that Monday morning; Flutter, headquartered in Dublin but listed in London, led the charge with its 7.6% surge, pushing its market cap higher amid FanDuel's dominant U.S. position, where it commands over 40% of the sports betting handle according to recent industry data.

Entain followed closely at 6.4%, buoyed by its BetMGM joint venture with MGM Resorts, which holds significant market share in states like New Jersey and Michigan; traders reacted to the news by betting on reduced competition, since prediction markets offer lower vig and blockchain anonymity that traditional apps can't match easily.

And yet, not all UK gambling names moved in lockstep; smaller operators like 888 Holdings edged up modestly, around 2%, while DraftKings' ADR, though U.S.-focused, saw sympathy gains of 4.1%, highlighting how interconnected the transatlantic betting landscape has become.

Prediction Markets Versus Traditional Sportsbooks: Key Differences Fueling the Clash

Prediction markets operate like binary options on future events, settling yes/no on outcomes with contracts priced from $0.01 to $1, often via crypto for Polymarket users; traditional sportsbooks, regulated state-by-state, provide point spreads, moneylines, and props with juice built into odds, generating billions in U.S. handle—$150 billion projected for 2026 per the American Gaming Association.

But here's the thing: prediction platforms erode edges for incumbents by offering peer-to-peer liquidity without intermediaries, which is why FanDuel and BetMGM lobby heavily; data from CFTC filings shows Kalshi's sports volumes spiking 300% in early 2026, siphoning users who prefer event contracts over parlays.

Those who've studied this space, including researchers at Cornell University who analyzed 2025 election betting, found prediction markets aggregate information efficiently but raise integrity risks without sportsbook-style geofencing and age verification; that's where the rubber meets the road for lawmakers balancing innovation against consumer protections.

Regulatory Scrutiny Building in the U.S. Landscape

This bill emerges from months of Wall Street Journal coverage on CFTC debates, where commissioners split on sports contracts despite approving weather and economic futures; earlier in 2026, the CFTC issued warnings to platforms over election betting volumes exceeding $3 billion on Polymarket alone, underscoring enforcement challenges.

Senator Curtis, with his tech background, argued during introduction that sports belong under state gaming commissions, not federal commodity rules; Schiff echoed integrity concerns, citing instances where large bets swayed public discourse, although platforms counter with self-reported safeguards.

Now, with 38 states legalizing sports betting since 2018's PASPA repeal, the industry generated $13.7 billion in revenue last year; traditional operators, facing 10-15% vig compression from upstarts, welcome any tilt toward incumbents, especially as mobile handle hits 80% of total wagers.

Company Profiles and Strategic Positions

Flutter Entertainment boasts a portfolio spanning Paddy Power, Betfair, and PokerStars alongside FanDuel, which processed $4.5 billion in U.S. revenue for 2025; its London shares, trading around £180 pre-surge, reflect investor bets on regulatory moats strengthening.

Entain, rebranded from GVC, leverages Ladbrokes' UK high street presence and BetMGM's U.S. growth, where it hit profitability in Q4 2025; the 6.4% climb took shares past £10, with analysts noting lower prediction market threats could boost EBITDA margins by 2-3 points.

One case worth watching involves Evoke or SIS-linked firms, but the big wins centered on transatlantic giants; traders piled in during early London hours, volume doubling average, signaling conviction that the bill advances through committees.

Potential Ripple Effects Across Markets

Should the legislation pass, CFTC-regulated platforms pivot to non-sports events like Fed rate decisions, leaving sportsbooks unchallenged on NFL Sundays; Australian observers, via the Australian Business site on global gambling flows, note similar dynamics Down Under where TAB dominates amid crypto betting curbs.

Yet challenges loom: platforms lobby via blockchain groups, arguing CFTC approval predates sports entry; bipartisan support helps, but midterms loom in November 2026, potentially stalling votes.

People in the industry often discover these shifts reshape handle distribution; for instance, when New York restricted certain props in 2024, DraftKings gained 5% share overnight, a pattern repeating here potentially.

It's noteworthy that European stocks react fastest to U.S. policy, given 60% of Flutter's revenue stems stateside; that said, UK tax hikes linger as headwinds, but this U.S. news provides tailwinds where it counts.

Conclusion

The March 23, 2026, introduction of the Schiff-Curtis bill marks a pivotal moment, propelling UK gambling stocks like Flutter and Entain upward on prospects of sidelining prediction markets from sports betting; as CFTC oversight tightens, traditional sportsbooks stand to reclaim turf, with market data underscoring the stakes in a $150 billion arena.

Turns out, in the high-stakes world of wagering regulation, bipartisan action cuts through noise, benefiting London listings while reshaping U.S. competition; observers await committee hearings, where the ball's now in lawmakers' court.