Why Is Wisconsin Taking Action Against Prediction Markets?
Wisconsin’s attorney general has filed lawsuits against a group of fintech and crypto platforms, including Kalshi, Robinhood, Coinbase, Polymarket and Crypto.com, accusing them of facilitating illegal sports betting through event contracts. The complaints, filed April 23 in Dane County, seek to block the companies from offering sports-related markets to users in the state.
Attorney General Josh Kaul is requesting both preliminary and permanent injunctions, along with a court ruling declaring the platforms’ operations unlawful under Wisconsin gambling law and a public nuisance. The filings argue that, with limited exceptions, sports betting and most forms of commercial gambling have long been illegal in the state.
The core claim is that relabeling wagers as “event contracts” does not change their underlying function. According to the complaints, the platforms list contracts that pay out based on real-world outcomes while charging transaction fees, generating revenue from Wisconsin users in violation of state law.
How Central Are Sports Contracts to the Business Model?
The lawsuits place particular focus on Kalshi, highlighting the scale of its sports-related activity. State filings claim that sports contracts account for nearly 90% of the platform’s business and cite estimates that annualized revenue from these products exceeds $1 billion.
Robinhood and Coinbase are also drawn into the case through distribution agreements that route user orders to Kalshi’s markets. Robinhood’s event trading hub has processed billions of dollars in volume, offering exposure to sports, macroeconomic data, and political outcomes. Coinbase has similarly integrated prediction markets powered by Kalshi, allowing users to trade contracts tied to real-world events.
For state regulators, the structure raises concerns that large-scale wagering activity is occurring outside established licensing frameworks, despite being presented as financial instruments.
Investor Takeaway
What Does This Say About Federal vs State Jurisdiction?
The Wisconsin case reflects a broader conflict between state gambling laws and federal oversight of derivatives markets. The Commodity Futures Trading Commission has argued in some cases that event contracts fall within the federal derivatives framework, while state regulators continue to treat them as unlicensed betting.
This divide has led to inconsistent enforcement. A Nevada judge recently extended an order blocking Kalshi from offering sports contracts in that state, while authorities in Arizona have pursued similar actions. At the same time, Kalshi secured a federal appellate ruling limiting New Jersey’s ability to apply state gambling laws to certain CFTC-regulated contracts.
The result is a fragmented regulatory landscape where legality depends heavily on jurisdiction, with courts increasingly playing a central role in defining boundaries.
Investor Takeaway
How Far Could Enforcement Extend Across the Market?
Pressure is expanding beyond Wisconsin. In January, Tennessee regulators issued cease-and-desist orders to Kalshi, Polymarket and Crypto.com, instructing them to halt sports-related contracts, void existing positions, and refund users in the state.
New York authorities and other state enforcers have also scrutinized the distribution of event contracts through major platforms, particularly as trading volumes continue to grow. The increasing involvement of large brokers and exchanges has raised the stakes, bringing prediction markets closer to mainstream financial infrastructure.
The outcome of these cases will determine whether event contracts can operate as regulated financial products or face restrictions similar to traditional gambling. For now, the legal framework remains unsettled, with enforcement actions likely to continue on a state-by-state basis.