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

On March 23, 2026, shares of major UK-listed gambling companies climbed sharply during trading on the London Stock Exchange, triggered by news of a new bipartisan bill in the US Senate; Flutter Entertainment, the parent company of FanDuel, saw its stock rise 7.6%, while Entain, which owns Ladbrokes and holds a stake in BetMGM, increased by 6.4%. Investors reacted swiftly to the introduction of legislation by Senators Adam Schiff, a Democrat from California, and John Curtis, a Republican from Utah, designed to prohibit prediction market platforms regulated by the Commodity Futures Trading Commission (CFTC)—such as Kalshi and Polymarket—from offering contracts on sports betting outcomes. This move, according to reports from Investing.com UK, positioned traditional sportsbooks for potential gains by limiting competition from these newer platforms.

Flutter's surge stood out particularly, given its dominant position in the US market through FanDuel, which commands a significant share of legal sports betting handle across numerous states; Entain's uptick followed closely, reflecting its partnerships like BetMGM, a joint venture with MGM Resorts that has expanded rapidly since the 2018 Supreme Court decision overturning PASPA. Traders, sensing an edge for licensed operators, piled in, pushing the FTSE 250-listed firms higher amid broader market fluctuations.

The bill, formally introduced on that March day in 2026, targets a regulatory gray area where CFTC oversight allows prediction markets to trade event contracts—including sports outcomes—without the state-by-state gambling licenses required of traditional sportsbooks. Platforms like Kalshi have leaned heavily into this space, with data revealing that sports betting accounted for roughly 90% of its trading volume; Polymarket, operating largely on blockchain with crypto settlements, has similarly drawn bettors seeking yes/no outcomes on NFL games, NBA finals, or Super Bowl winners. Senators Schiff and Curtis framed the proposal as a safeguard for consumer protections and market integrity, arguing that CFTC-regulated entities evade the stringent rules enforced by state gaming authorities.

Under current CFTC rules, clarified in late 2024, these platforms can offer "event contracts" on elections, weather, or sports as long as they avoid being classified as outright gambling; but the bill seeks to draw a firm line, explicitly barring sports-related contracts to channel activity back to licensed operators who collect taxes, enforce age verification, and promote responsible gaming. Observers tracking Capitol Hill note this bipartisan effort echoes earlier pushes, like the 2024 debates over Kalshi's election betting contracts, yet focuses squarely on sports where volumes have exploded post-legalization.

Kalshi, founded in 2021 and CFTC-approved for event contracts the following year, quickly pivoted to sports after gaining traction with economic indicators and politics; by early 2026, its platform hosted markets on everything from player props to tournament winners, drawing millions in daily volume without needing Nevada Gaming Control Board approval or similar state nods. Polymarket, meanwhile, surged in popularity during the 2024 US election cycle, then expanded into sports amid crypto's mainstream push, allowing users to wager USDC stablecoins on outcomes like "Will the Chiefs win the AFC Championship?"

What's interesting here is how these platforms operate differently—prediction markets function as binary options where traders buy "yes" or "no" shares priced between $0.01 and $0.99, settling at $1 for correct predictions, which contrasts with traditional fractional odds at sportsbooks like DraftKings or Caesars; this structure, combined with lower barriers to entry, has siphoned bettors, especially those chasing high-volume events. Figures from Kalshi's own disclosures show sports dominating at 90%, underscoring the threat to incumbents who rely on vig margins and parlay boosts to stay profitable.

Traditional operators, licensed across 38 states by mid-2026 per the American Gaming Association, argue—and data supports—that prediction markets skirt responsible gaming tools like deposit limits or self-exclusion databases mandated by bodies such as New Jersey's Division of Gaming Enforcement; yet proponents counter that CFTC rules provide ample safeguards, including position limits to curb manipulation.

Flutter Entertainment, headquartered in Dublin but listed in London, has built FanDuel into America's top sports betting app since acquiring it in 2018, boasting over 3 million monthly users and handling billions in wagers annually; the 7.6% stock pop added hundreds of millions to its market cap, reflecting bets on reduced rivalry from upstarts. Entain, with roots in the UK high street via Ladbrokes Coral, saw its BetMGM partnership—launched in 2018—reach 30% US market share by 2026, per company filings, and the 6.4% gain mirrored investor relief at potential curbs on unlicensed alternatives.

Both firms have lobbied extensively for such measures; take Flutter's regulatory filings with the CFTC, where executives highlighted competitive distortions from event contracts, or Entain's testimony before congressional committees emphasizing state-level compliance costs that prediction markets dodge. And while the bill's passage remains uncertain—needing House approval and presidential sign-off— the mere introduction sparked the rally, as short-term traders capitalized on headlines.

Broader FTSE gambling sector peers, like 888 Holdings or Evoke, edged up modestly too, but Flutter and Entain led the charge, given their heavy US exposure; daily trading volumes spiked 40% above averages, according to London exchange data, showing how swiftly sentiment shifts in this volatile niche.

The CFTC, tasked with overseeing derivatives since 1974, has grappled with prediction markets since Kalshi's petition in 2020; a federal appeals court upheld its sports contracts approval in 2024, but states like New Jersey pushed back via lawsuits, claiming turf invasion. This bill builds on that tension, aligning with efforts by the National Council on Problem Gambling to standardize protections across platforms.

Internationally, similar dynamics play out; Australia's wagering regulator, the Northern Territory Racing Commission, monitors crypto betting sites, while Canada's provincial lotteries eye US spillovers. For UK firms, the US represents 60-70% of revenues—Flutter reports $12 billion from Americas in 2025 filings—so insulating that market from disruptors proves crucial. Kalshi countered the news by touting compliance, noting its $2 billion+ in total volume without major incidents, but traders still rotated into legacy names.

Short-term, stocks held gains into late trading; longer-term, analysts from firms like JPMorgan project traditional operators recapturing 10-15% of diverted handle if enacted, based on historical legalization patterns post-PASPA.

March 23, 2026, marked a pivotal moment when UK gambling stocks like Flutter and Entain surged 6-8% on word of the Schiff-Curtis bill targeting CFTC prediction markets' sports betting push; with Kalshi's 90% sports volume in the crosshairs, traditional operators stand to benefit from renewed exclusivity, channeling bets through licensed channels. As the legislation navigates committees—past similar bills took 6-18 months—markets will watch closely, since that's where the rubber meets the road for these global players. The writing's on the wall: regulatory clarity often favors the incumbents who've invested billions in compliance, and this episode underscores how a single bipartisan move can jolt shares across the Atlantic.