Prediction markets have exploded into the mainstream in 2026, with combined monthly volume across Kalshi and Polymarket reaching $44.8 billion in June — more than triple the roughly $14 billion average monthly handle of all legal US sportsbooks in 2025. What began as niche platforms for trading on election outcomes has become a genuine rival to traditional sports betting, and the shift carries real implications for anyone who wagers on sports alongside their poker. Our sportsbooks hub covers the traditional operators, but understanding this new competitor is increasingly essential.
What Prediction Markets Are
Prediction markets let traders buy and sell contracts tied to the outcome of real-world events — sports, politics, economics, and more. Instead of taking a fixed price from a sportsbook, participants trade contracts whose prices float based on supply and demand, with each contract paying out a fixed amount if the predicted outcome occurs. In effect, the "odds" are set by the market of traders rather than by a bookmaker's risk desk.
Both Kalshi and Polymarket, the two largest platforms in the United States, are regulated as designated contract markets under the Commodity Futures Trading Commission — a fundamentally different regulatory framework than the state-by-state licensing that governs traditional sportsbooks. That distinction is at the heart of why prediction markets have grown so fast: because they are regulated as financial exchanges at the federal level, they have been able to offer sports-related contracts in places where conventional sports betting remains illegal or restricted, effectively routing around the patchwork of state gambling laws.
The scale of the shift is striking. Prediction markets have rapidly emerged as a multibillion-dollar industry, and sports have become the most heavily traded category on both platforms in 2026, with major events like the World Cup driving record volume. Since mid-2024, sports have accounted for roughly 80% of total trading volume on Kalshi and around 39% on Polymarket, underlining just how central sports have become to the prediction-market boom.
Why Bettors Are Migrating
The appeal to bettors is easy to understand. First is access: because prediction markets operate under federal commodities regulation, they are available in states where traditional sportsbooks are not — a huge draw for bettors in restricted markets. Second is pricing. Because prices are set by a market of traders rather than a bookmaker building in a margin, sharp participants often find better effective odds than a sportsbook would offer, particularly on liquid contracts. Third is the trading dynamic itself: participants can buy and sell positions as events unfold, locking in profits or cutting losses in a way that resembles financial trading more than a static bet.
This last point resonates strongly with poker players. The skills that make a winning poker player — thinking in probabilities, assessing whether a price offers genuine value, and managing risk across many positions — transfer directly to prediction-market trading. A player who instinctively calculates whether the implied odds of a contract are out of line with the true probability is doing exactly the kind of expected-value analysis that underpins winning poker. The crossover between poker, sports betting, and prediction-market trading is a natural one, and many players who cut their teeth on the felt find the transition intuitive.
That said, the fundamentals of discipline still apply. The bettor or trader who takes positions on every available market is as doomed as the poker player who plays every hand. Success in prediction markets, as in poker and sports betting, comes from patience, selectivity, and betting only when the price is genuinely wrong. Books that combine sports and poker under one roof, like BetOnline with its BetOnline Sportsbook, remain a solid home base for players who want traditional markets alongside their poker, while prediction markets offer a complementary avenue.
What It Means for the Sportsbook Industry
The rise of prediction markets is a genuine competitive threat to traditional sportsbooks, and the industry is watching closely. When a pair of federally regulated exchanges can generate three times the monthly volume of the entire legal US sportsbook sector, the incumbents cannot ignore it. Expect traditional operators to respond by improving pricing, expanding markets, and lobbying regulators to clarify — or contest — the boundaries between sports betting and event-contract trading.
There is also an ongoing regulatory tension. State gaming regulators and some sportsbook operators argue that sports-outcome contracts are functionally sports betting and should be regulated as such, while prediction-market platforms maintain they are legitimate financial instruments under CFTC oversight. How that debate resolves will shape the competitive landscape for years, and it is one of the most consequential open questions in the entire betting industry. For now, the two models coexist, giving bettors more choice than ever.
For players, the fragmentation echoes what is happening in online poker, where a once-consolidated market has splintered into global rooms, crypto-native platforms, and regulated in-state products. Just as savvy poker players learn to navigate crypto poker and traditional rooms alike, savvy bettors are learning to move between sportsbooks and prediction markets to find the best price and access. Operators like TigerGaming and SportsBetting.ag continue to serve the traditional side of that equation for a broad US audience.
What This Means for Bettors
The prediction-market boom of 2026 is one of the biggest stories in the entire betting world, and it is reshaping how people wager on sports. With $44.8 billion in combined monthly volume, federal regulation that sidesteps state gambling restrictions, and pricing set by traders rather than bookmakers, platforms like Kalshi and Polymarket have become a serious alternative to traditional sportsbooks — especially for bettors in restricted states and those who value sharper, market-driven prices.
For poker players, the crossover is natural: the probabilistic thinking, value assessment, and risk management that win at the tables apply directly to prediction-market trading. But the same discipline is required — patience, selectivity, and betting only when the price is genuinely mispriced. Whether you stick with traditional books, explore prediction markets, or use both, the winning approach is the same one that makes for a winning poker player. Compare the top traditional operators for the season ahead in our sportsbooks hub, and keep an eye on how the regulatory battle between these two models unfolds.