Prediction Markets Surge Amid Legal Battles and Ethical Scrutiny
Kalshi and Polymarket have moved from niche forums into mainstream conversation through partnerships with media outlets such as CNN and CNBC and with sports organizations like Major League Baseball. Trading volume has exploded; Kalshi reports $3 billion in weekly notional trading, up from $30 million at the start of 2025. A new class of “market watchers” now trades on news and information, treating events as tradable assets.
Operational Mechanics
Prediction markets are regulated at the federal level by the Commodity Futures Trading Commission (CFTC). They function as peer‑to‑peer exchanges: a buyer who purchases a “yes” share must be matched with a seller offering a “no” share, so the platform itself never takes the opposite side of a bet. Shares represent binary outcomes and trade between one cent and 99 cents, with prices reflecting collective market demand. Revenue comes from transaction fees rather than from users losing money, a point underscored by the quote, “We don’t actually make money when people lose.”
Legal and Regulatory Battles
State attorneys general argue that prediction platforms constitute illegal sports gambling and bypass state tax revenue, prompting lawsuits that challenge the federal classification. Arizona has filed criminal charges against Kalshi, and the company plans to contest them in court. The Biden administration has been critical of the industry, whereas the Trump administration has signaled support for keeping it legal. The resolution of these cases could compel a fundamental redesign of business models, especially as the 2024 U.S. election approaches.
Ethical and Market Risks
Insider trading is described by some participants as a “feature” that signals market sentiment, though platforms are introducing rules to curb the practice. Betting on sensitive events such as military actions or violence sparks debate over the financialization of conflict, captured in the remark, “One of the criticisms of prediction markets is that they’ve created the financialization of everything.” Retail investors often lose money, while professional traders with sophisticated research strategies tend to profit. Low‑liquidity markets are especially prone to manipulation, where modest capital can shift odds dramatically.
How the Markets Work
Users buy shares in a binary outcome; the share price moves between one cent and 99 cents as traders collectively assess the likelihood of the event. Each platform defines clear resolution criteria and data sources to determine the final outcome. Once the event occurs, the market resolves and winners receive payouts based on the final share price.
Takeaways
- Prediction platforms such as Kalshi and Polymarket have entered mainstream media and sports partnerships, driving a jump to $3 billion in weekly notional trading.
- The markets operate as peer‑to‑peer exchanges where buyers and sellers match on binary outcomes, and the platforms earn only transaction fees.
- Federal regulators, led by the CFTC, classify these platforms as commodities, while several states sue them as illegal sports gambling, creating a federal‑state jurisdiction clash.
- Critics warn that insider trading functions as a market “feature,” that betting on wars or violence raises moral concerns, and that low‑liquidity markets are vulnerable to manipulation.
- Ongoing court decisions, especially ahead of the 2024 U.S. election, could force fundamental changes to the business models of prediction‑market operators.
Frequently Asked Questions
Why are states suing prediction‑market platforms as illegal sports gambling?
States claim that prediction markets bypass state‑level gambling regulations and tax collection, treating them as illegal sports betting. By arguing that the platforms operate outside state licensing frameworks, they seek to protect revenue and enforce local gambling laws.
How do peer‑to‑peer prediction markets match bets without a house taking the opposite side?
The platform acts only as an intermediary, pairing a user who wants to buy a “yes” share with another who offers a “no” share at the same price. This matching creates a balanced market without the platform assuming any risk or profit from the outcome.
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How the Markets Work
Users buy shares in a binary outcome; the share price moves between one cent and 99 cents as traders collectively assess the likelihood of the event. Each platform defines clear resolution criteria and data sources to determine the final outcome. Once the event occurs, the market resolves and winners receive payouts based on the final share price.
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