Prediction market trading volumes reached record levels in June 2024, driven by a surge in activity on platforms including Polymarket and Kalshi. The spike coincided with major international sporting events, such as the ICC Men’s T20 World Cup, and heightened speculation surrounding the U.S. presidential election cycle.
The growth reflects a broader shift in how global audiences engage with event-based forecasting. Unlike traditional sports betting, these platforms allow users to trade “shares” in the outcome of a specific event, with the market price acting as a real-time probability estimate of that outcome.
Polymarket, a decentralized platform based on the Polygon blockchain, saw a significant increase in volume as users hedged bets on both political candidates and sports results. According to data from Dune Analytics, Polymarket’s volume has scaled rapidly throughout 2024, often outpacing traditional betting markets in terms of predictive accuracy for political events.
Kalshi, a U.S.-based exchange regulated by the Commodity Futures Trading Commission (CFTC), also reported record activity in June. The platform specializes in event contracts, allowing traders to speculate on everything from economic indicators to legislative outcomes. Kalshi’s growth comes amid a high-profile legal battle with the CFTC over the platform’s right to offer contracts on U.S. election results.
Why did prediction market volumes spike in June?
The volume increase resulted from a convergence of high-stakes sporting events and critical political milestones. The ICC Men’s T20 World Cup, which took place from June 1 to June 29, 2024, drew substantial global interest, prompting traders to use prediction markets to speculate on match winners and tournament champions.
Simultaneously, the U.S. political calendar accelerated. The first presidential debate between Joe Biden and Donald Trump on June 27 triggered a massive wave of trading on Polymarket, as the market price for the candidates’ probabilities shifted in real-time based on debate performance. This intersection of sports and politics created a “perfect storm” for trading volume.
Market analysts note that prediction markets differ from traditional gambling because they provide “information gain.” While a bookmaker sets odds to ensure a profit, prediction markets are driven by the collective wisdom of participants, meaning the price of a contract often serves as a more accurate forecast than traditional polling.
How do Kalshi and Polymarket differ in regulation?
The two platforms operate under fundamentally different legal frameworks, which impacts their availability and the types of contracts they offer.
Kalshi operates as a Designated Contract Market (DCM) and is subject to strict oversight by the Commodity Futures Trading Commission (CFTC). This regulation requires Kalshi to maintain rigorous capital requirements and consumer protections. However, this relationship has been contentious; the CFTC previously attempted to block Kalshi from offering election-related contracts, arguing they were “gaming” rather than “hedging.”
Polymarket operates as a decentralized finance (DeFi) platform. Because it utilizes cryptocurrency and smart contracts, it bypasses many of the traditional intermediaries found in U.S. financial markets. While this allows for faster innovation and a wider array of global markets, it has led to regulatory friction. Polymarket previously reached a settlement with the CFTC in 2022 and has since restricted access to users within the United States to avoid further legal conflict.
What is the impact of ‘Information Markets’ on forecasting?
The rise in volume suggests that prediction markets are becoming viable alternatives to traditional polling and punditry. In a prediction market, participants put their own money at risk, which creates a strong incentive to find the most accurate information available.
This mechanism is often referred to as the “wisdom of the crowd.” When thousands of traders buy and sell shares of an outcome, the resulting price converges toward the actual probability of the event occurring. For example, during the T20 World Cup, market shifts often preceded official updates or expert analysis, as traders reacted to on-the-ground data more quickly than traditional media outlets.
The utility of these markets extends beyond profit. Businesses and governments can use prediction market data to hedge against risks. If a company believes a specific policy change is likely, they can buy contracts that pay out if that policy passes, effectively creating an insurance policy against political volatility.
What happens next for event-based trading?
The focus of prediction markets is expected to shift further toward the U.S. General Election in November. Historically, volume peaks in the final quarter of an election year, suggesting that the June records may be surpassed as the voting date approaches.
Furthermore, the legal outcome of the Kalshi-CFTC dispute will likely determine the future of regulated prediction markets in the U.S. If the courts permanently allow election contracts on regulated exchanges, it could open the door for institutional investors—such as hedge funds and corporate treasuries—to enter the market, potentially driving volumes into the tens of billions of dollars.
As more global sporting events, such as the Euro 2024 and Copa América, conclude, the market is likely to see a temporary dip before the final surge of the election cycle begins.
The next major catalyst for these markets will be the release of official polling data and the announcement of party conventions in the coming months.
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