US Prediction Market Boom vs. UK Betting Exchange Decline: A Deep Dive
US Prediction Market Boom vs. UK Betting Exchange Decline: A Deep Dive
Introduction: Two Sides of the Atlantic, Two Different Fortunes
The latest Gambling Commission Annual Report for 2025/26 has laid bare a striking divergence: while betting exchanges in the United Kingdom continue their long-term slump, prediction markets across the Atlantic are experiencing explosive growth. This contrast raises fundamental questions about consumer preferences, regulatory frameworks, and the future of financial-style betting products.
In the UK, betting exchanges now account for just 3.79% of Gross Gambling Yield (GGY) — a mere £92.66 million for the period April 2025 to March 2026. That figure represents a 46% drop since 2016/17, when exchange GGY stood at £171.53 million. By comparison, high-street land-based betting shops saw a softer decline of 26.8% over the same period, despite receiving far more media attention for their woes.
Meanwhile, in the United States, prediction market platforms like Polymarket and Kalshi are eyeing valuations in the billions. The British Overseas Territory of Gibraltar has even established the first standalone regulatory framework for prediction markets, signalling growing international interest.
But are these two products truly apples and oranges? Or is the UK exchange decline a canary in the coal mine for prediction markets? This guide explores the data, the mechanics, the regulatory landscape, and the possible futures for both sectors.
Section 1: The State of UK Betting Exchanges – A Steady Slide
Historical Context and Current Data
Betting exchanges once revolutionised British gambling. Platforms like Betfair Exchange (now part of Flutter Entertainment) allowed users to back and lay outcomes against each other, with the operator taking a small commission. At their peak in 2016/17, exchanges generated £171.53 million in GGY. By 2025/26, that figure had more than halved to £92.66 million.
| Period | Exchange GGY (£m) | Remote Sportsbook GGY (£m) |
|---|---|---|
| 2016/17 | 171.53 | 1,750 |
| 2025/26 | 92.66 | ~2,500 |
The decline is not just absolute but relative. While remote sportsbook GGY rose from £1.75bn to approximately £2.5bn over the same period — a growth of over 40% — betting exchanges contracted sharply. This suggests that consumers are migrating to traditional fixed-odds sportsbooks rather than leaving gambling altogether.
Key Players and Recent Revamps
Despite the slide, several established operators continue to invest in the exchange model:
- Betfair Exchange remains the dominant player.
- Spreadex offers a combined spread betting and exchange service.
- Matchbook recently became the first UK exchange to enter prediction markets, signing a white-label deal with ADI Predictstreet ahead of the FIFA World Cup.
- Smarkets revamped its platform to resemble a US-style prediction market interface.
Yet these efforts have not reversed the trend. Exchange GGY has dropped faster than retail betting shop revenue, despite much less media scrutiny.
Section 2: Understanding Betting Exchanges vs. Prediction Markets
How Betting Exchanges Work
A betting exchange is a peer-to-peer marketplace where users bet against each other. The operator acts as a facilitator, taking a commission (typically 2–5%) on winning bets. Users can:
- Back an outcome (traditional bet on something happening).
- Lay an outcome (bet against it happening, acting as the bookmaker).
This creates a market-driven odds formation, often offering better value than fixed-odds bookmakers. Exchanges are regulated in the UK by the Gambling Commission under the Gambling Act 2005.
How Prediction Markets Work
Prediction markets are financial derivatives platforms where users trade “event contracts” priced between $0 and $1. Each contract represents the probability of a specific event occurring. For example:
- A contract on “Candidate A wins the 2028 US election” might trade at $0.65, implying a 65% probability.
- Traders buy low and sell high, or hold to expiry to receive $1 if the outcome occurs.
Unlike betting exchanges, prediction markets are often regulated as financial instruments rather than gambling products. In the US, platforms like Polymarket (crypto-based) and Kalshi (CFTC-regulated) operate under distinct rules.
Key Similarities and Differences
| Feature | Betting Exchange | Prediction Market |
|---|---|---|
| Core mechanic | Peer-to-peer betting | Trading event contracts |
| Pricing | Odds based on supply/demand | Contract price = implied probability |
| Revenue model | Commission on wins | Platform fees, spread |
| Regulation | Gambling commission | Financial regulator (e.g., CFTC) |
| Typical events | Sports, politics, entertainment | Politics, finance, sports, pop culture |
Industry commentators often highlight the financialised nature of both products. As Jason Trost, CEO of Smarkets, told SBC News:
“They’re called betting exchanges in the UK. They’ve existed for 20+ years in the UK in a very legal, stable framework here. This concept of a prediction market coming to the UK – it’s here already. It’s like soccer and football – they’re not apples and oranges, they’re both apples.”
Section 3: Why Are UK Betting Exchanges Declining?
The Rise of Bet Builders and Accumulators
One major factor is the evolution of traditional sportsbooks. Operators now offer bet builders (custom multi-selection bets on a single match) and multi-sport accumulators that improve user engagement. These products mimic some of the flexibility of exchanges but with simpler interfaces and immediate liquidity. Exchanges, which require understanding of laying and back-lay dynamics, can be intimidating to casual bettors.
Shifting Consumer Preferences
Younger gamblers increasingly favour mobile-first, instant-gratification experiences. Betting exchanges often require higher minimum stakes and longer settlement times. The “social” and “gamified” elements popular in modern sportsbooks are less prevalent on exchanges.
Regulatory Pressure and Market Maturity
The UK gambling market is one of the most regulated in the world. Stricter advertising rules, affordability checks, and a public health narrative around gambling harm may disproportionately affect exchange betting, which is often associated with higher-stakes, more “professional” users. Meanwhile, the exchange user base — often experienced traders — may be ageing or moving to unregulated offshore alternatives.
Competition from Prediction Markets?
A key question is whether exchange bettors are being drawn to prediction markets instead. Given the structural similarities, it’s plausible that some UK users are accessing US-based prediction platforms via VPNs, bypassing domestic restrictions. However, the data shows a direct correlation: as exchanges decline, fixed-odds sportsbooks grow, suggesting most former exchange users are migrating to traditional bookmakers rather than prediction markets.
Section 4: The US Prediction Market Boom – A Billion-Dollar Opportunity
Exponential Growth
In the United States, prediction markets have gone mainstream. Polymarket processed over $100 billion in trading volume in 2024, driven largely by political events and the US presidential election. Kalshi, which operates under CFTC regulation, has expanded into sports, finance, and pop culture. Both platforms are reportedly eyeing valuations in the billions.
Key drivers include:
- Regulatory clarity under the Commodity Futures Trading Commission (CFTC) for “event contracts”.
- Cultural acceptance of trading-like gambling, especially among younger demographics.
- Integration with fantasy sports (e.g., Underdog, acquired by UK-listed IG Group).
International Expansion
Gibraltar became the first jurisdiction to create a standalone regulatory framework for prediction markets, positioning itself as a hub for the sector. This move could pave the way for other European regulators to follow suit.
Section 5: Regulatory Hurdles for Prediction Markets in the UK
The Current Prohibition
The UK effectively blocks retail access to prediction markets through a ban on unlicensed binary-option style products. These products fall under the Financial Conduct Authority (FCA) remit rather than the Gambling Commission. Since 2020, the FCA has prohibited the sale of binary options to retail consumers, citing high risk and poor investor outcomes.
This ban prevents UK-based firms from offering prediction market contracts to the general public. However, it does not stop UK users from accessing overseas platforms via a VPN, creating an unregulated grey market.
FCA Exploratory Talks
In a significant development, the FCA recently held exploratory talks about potentially relaxing these restrictions. While no formal proposals have been made, the discussions indicate that regulators are aware of the demand and the economic opportunity. A regulatory change could open the door for licensed prediction market operators in the UK.
Corporate Moves by UK Firms
Several UK-listed companies are already positioning themselves:
- IG Group, a FTSE 250 spread betting and CFD provider, acquired Underdog — a US daily fantasy sports platform that is pivoting to prediction markets as its primary offering.
- Plus 500, another FTSE 250 constituent, launched its own US-facing prediction market product in 2025 via a partnership with Kalshi.
These moves suggest that key stakeholders believe prediction markets can succeed in the UK, even as betting exchanges struggle.
What Would Prediction Markets Look Like in the UK?
If the FCA were to allow retail access, UK prediction markets would likely be more restricted than their US counterparts. Controversial contracts on politics, wars, or other sensitive topics — common on Polymarket — are unlikely to be permitted under FCA rules. Instead, UK platforms would probably focus on sports, entertainment, and finance, mirroring the existing exchange content but with a trading interface.
Section 6: Could Prediction Markets Revive UK Betting Exchanges?
A Possible Synergy
Some industry analysts argue that prediction markets could complement rather than cannibalise betting exchanges. For instance:
- Exchanges could offer prediction market-style contracts alongside traditional sports markets, attracting a new user base.
- Technology developed for prediction markets (e.g., automated market makers, improved liquidity algorithms) could be applied to exchanges.
- A hybrid platform — where users can both exchange-bet and trade event contracts — could capture the best of both worlds.
The “Bolt-On” Model
Matchbook’s entry into prediction markets exemplifies this approach. The company added prediction contracts as an additional product layer, rather than replacing its exchange. This strategy allows operators to test the waters without abandoning their core exchange business.
The Bigger Picture
Whether prediction markets can thrive in the UK ultimately depends on regulatory clarity. The Gambling Commission data on betting exchanges provides a cautionary tale: even well-established exchange products can decline if they fail to evolve. Prediction markets, if properly regulated, could inject new life into the UK’s financial-style betting ecosystem — but only if they are designed for the British consumer’s preferences and regulatory expectations.
Conclusion: A Tale of Two Markets
The contrast between the UK’s shrinking betting exchange sector and the US’s soaring prediction market industry is not merely a statistical curiosity. It reflects deeper differences in consumer behaviour, regulatory philosophy, and product innovation.
- UK betting exchanges are losing ground to more accessible, feature-rich sportsbooks.
- US prediction markets are benefitting from a less restrictive regulatory environment and a cultural appetite for trading-style products.
- Gibraltar is leading the way in international regulation.
- UK regulators (FCA and Gambling Commission) are beginning to consider potential changes.
For now, betting exchange operators in the UK must innovate or continue to decline. Prediction market platforms, meanwhile, are watching closely from across the Atlantic, waiting for the regulatory door to open. When it does, the landscape could shift dramatically — and perhaps, the two “apples” will finally meet.
Want to learn more?
The Global Prediction Market Forum will be held in Lisbon on 1 October 2025. Details at: https://sbcevents.com/global-prediction-markets-forum/