The US Senate unanimously approved a measure prohibiting senators and their staff from trading in prediction markets. The ban covers transactions tied to political and economic event outcomes.

Scope of the ban

The rule bars participation in any market or platform that allows wagers on the outcome of elections, legislation, or other public events. It applies to both direct trades and indirect arrangements through intermediaries.

Reasoning and context

Senators cited concerns about insider information and conflicts of interest when lawmakers or staff could profit from privileged knowledge. The decision follows recent debates over trading ethics and transparency in public office.

Platforms and public debate

The measure was adopted amid growing attention to platforms such as Polymarket and Kalshi, which allow users to speculate on event outcomes. Lawmakers noted the rapid increase in popularity of such services as a factor in the vote.

Enforcement and implications

Details on enforcement mechanisms and potential penalties for violations will be defined in implementing guidance. Observers expect agencies to issue clarifications on permitted and prohibited activities for congressional offices.

Next steps

Congressional ethics offices and relevant committees will coordinate to translate the Senate decision into binding rules. The measure now requires administrative steps to finalize compliance procedures for staff and members.