How Prediction Markets Turned the World Into a Casino

Key Concepts

• Prediction Markets: Online platforms where users trade shares based on the outcome of future events (e.g., elections, sports, weather).
• Notional Trading Volume: The total value of the underlying assets or contracts being traded.
• Derivative: A financial contract whose value is derived from an underlying asset or event.
• Peer-to-Peer (P2P) Betting: A system where users bet against each other rather than against a "house" or bookmaker.
• Event Resolution Criteria: The specific data sources and conditions defined by a platform to determine the outcome of a bet.
• Insider Trading: The practice of using non-public, privileged information to gain an unfair advantage in financial markets.

1. The Rise of Prediction Markets

Prediction markets like Kalshi and Polymarket have seen explosive growth, with Kalshi’s weekly notional trading volume surging from $30 million in early 2025 to $3 billion. These platforms have moved into the mainstream, securing partnerships with major media outlets (CNN, CNBC) and attracting investment from entities like the New York Stock Exchange. Unlike traditional sportsbooks, these platforms function as exchanges where users buy "Yes" or "No" shares priced between 1 cent and 99 cents, determined by market supply and demand.

2. Regulatory Landscape and Legal Challenges

The industry faces significant friction with U.S. state regulators:

• Jurisdictional Disputes: States that have legalized sports betting are suing platforms like Kalshi and Polymarket, arguing that these sites facilitate sports gambling without state oversight or tax collection.
• Federal Oversight: These platforms are regulated by the Commodity Futures Trading Commission (CFTC). While the Biden administration was critical of the industry, the Trump administration has signaled stronger support for keeping these markets legal.
• Operational Strategies: Kalshi is focusing on international expansion (targeting 140 countries), while Polymarket has sought federal registration to resume specific operations within the U.S.

3. The Ethics of "Financializing Everything"

A central debate is whether it is ethical to bet on sensitive real-world events, such as military conflicts or political outcomes.

• Conflict Betting: While the CFTC prohibits betting on assassination, terrorism, or war, international platforms like Polymarket may still host such markets, leading to criticism regarding the "financialization of everything."
• Insider Trading as a Feature: In traditional finance, insider trading is illegal. In prediction markets, some proponents argue that insider information acts as a "signal" that helps the market price reflect reality more accurately. A notable case involved an anonymous user profiting $400,000 on the capture of Nicolás Maduro, suggesting the use of non-public information.

4. Market Dynamics and User Behavior

• The "Dumb Money" vs. Professionals: Research indicates that, similar to Wall Street, professional traders with sophisticated research methodologies consistently outperform retail investors.
• Strategy: Successful users, such as the teacher Brandon Fiend, treat these platforms like stock markets, utilizing deep research (e.g., tracking fan pages for music chart predictions) to gain an edge over casual bettors.
• Sports Dominance: Despite the ability to bet on esoteric events, approximately 70% of Kalshi’s volume is driven by sports-related wagers, highlighting that for most users, these platforms serve as an alternative to traditional sportsbooks.

5. Notable Statements

• On the nature of the market: "From the perspective of the prediction markets, this is not gambling. This is trading a derivative like any other derivative."
• On the role of information: "I think what's cool about Polymarket is that it creates this financial incentive for people to go and divulge the information to the market and the market to change."
• On the regulatory stance: "To those who seek to challenge our authority in this space, let me be clear. We will see you in court."

Synthesis and Conclusion

Prediction markets represent a convergence of financial technology and speculative betting. While they offer a unique mechanism for aggregating information and predicting future outcomes—often outperforming traditional polling—they remain in a precarious legal and ethical position. The industry’s future depends on the outcome of ongoing court cases regarding state-level jurisdiction and the ability of these platforms to balance the "feature" of insider information with the need for market integrity. Ultimately, while they are marketed as sophisticated trading tools, the majority of participants currently use them for entertainment, mirroring the risks and outcomes of traditional gambling.