Prediction Market Crackdown Adds Pressure for Stock Trading Ban

A move by the US Congress against prediction-market trading is putting new attention on a longer-running ethics fight: whether lawmakers should be allowed to buy and sell individual stocks while in office. 

The Senate recently approved a rule barring senators, staff members, and officers from participating in prediction markets, where users can wager on political, economic, and geopolitical outcomes. The measure followed rising concern that officials with access to sensitive information could profit from markets tied to public events before ordinary traders know what is happening. 

That action has strengthened arguments for a broader congressional trading ban. Newsweek reported that the prediction-market crackdown has renewed pressure for stock-trading restrictions, a debate that has persisted in Congress for years. 

Lawmakers are already covered by the STOCK Act, which requires disclosure of many securities transactions and bars the use of nonpublic information for private gain. Critics say disclosure does not remove the conflict itself. 

The current dispute differs in format but is similar in substance. The best prediction markets can move quickly in response to elections, military developments, court rulings, and policy decisions. 

Stock trades can also benefit from early knowledge of legislation, regulation, or economic policy. In both cases, the public concern is not only whether illegal conduct occurs. It's also whether elected officials can appear to profit from information gained through public office. 

The Senate's ban applies to its own chamber, but lawmakers and ethics advocates are already pointing to the House and other branches of government. The pressure now sits where it has often stalled before: turning ethics concern into a binding rule that limits personal financial activity across Congress. 

Trump's Softer Tone Keeps Prediction Markets in the Spotlight 

That congressional push is unfolding as prediction markets remain politically visible well beyond Capitol Hill. President Donald Trump recently moderated his criticism of prediction markets after earlier expressing discomfort with the sector's growth.  

He acknowledged that some experienced market participants support the platforms and noted that other countries are allowing similar activity. 

The shift did not end the regulatory fight. Polymarket and Kalshi recorded a combined $23.6 billion in March trading volume, while legal pressure has expanded across several US jurisdictions. 

State officials have challenged whether event contracts tied to sports, elections, and real-world outcomes should be treated as gambling, while platform operators have argued that they fall under federal regulation.  

New York, Wisconsin, Nevada, Massachusetts, and Illinois were among the jurisdictions cited in the report as part of the broader enforcement picture. Wisconsin complaints named firms, including Crypto.com, Polymarket, and Kalshi, along with distribution partners Coinbase and Robinhood. 

The political overlap has also drawn attention. Donald Trump Jr. has advisory roles connected to both Polymarket and Kalshi, while Trump Media has announced plans for prediction-market products through a partnership with Crypto.com.  

That combination of political access, market growth, and legal uncertainty is why the issue is now being treated as more than a niche crypto-market story.