Congress Investigates Kalshi and Polymarket Over Insider Trading Concerns

Congress is increasing pressure on the growing prediction markets industry. On May 22, House Oversight and Government Reform Committee Chairman James Comer announced investigations into possible insider trading involving prediction market platforms Kalshi and Polymarket.

Comer revealed the investigations during an appearance on CNBC’s “Squawk Box.” The probe focuses on suspicious trades connected to political events and U.S. military actions.

Comer Announces the Investigation

Comer chose national television to publicly announce the investigations, signaling that Congress plans to closely examine the prediction market industry.

During the interview, Comer pointed to trades connected to elections and U.S. military activity involving Venezuela and Iran. While he did not provide full details, the comments raised concerns that some traders may have used private information to make profits before important events became public.

The investigation marks one of the biggest congressional actions yet involving prediction markets in the United States. These platforms have grown quickly in recent years, especially during the 2024 presidential election cycle.

The Insider Trading Concern, and Why the Investigation Matters

The main issue in the investigation is whether some traders had access to non-public information before placing trades. According to the committee, suspicious trades were linked to election-related markets and contracts involving military actions in Venezuela and Iran. A U.S. solider was arrested in April for winning $400,000 on a raid on Venezuelan president Nicolas Maduro.

In traditional financial markets, insider trading laws are enforced by agencies like the Securities and Exchange Commission (SEC). However, the rules surrounding prediction markets are less clear.

That uncertainty is one reason the investigation matters. Lawmakers are still debating which agencies should regulate prediction markets and how those rules should work.

The probe comes at a major moment for both the betting and prediction markets industries. Since the Supreme Court’s 2018 Murphy v. NCAA decision, regulated sports betting has expanded to more than 30 states.

Regulated sportsbooks like DraftKings and FanDuel follow strict state regulations and integrity rules. Prediction markets, however, have operated in a less clearly defined system.

A high-profile congressional investigation could push lawmakers and regulators to create stronger federal oversight. That could force prediction market companies to follow rules more similar to those used in the sports betting industry.

What Happens Next?

The investigations place Kalshi and Polymarket under intense public and political attention at a time when prediction markets are trying to gain long-term acceptance in the U.S.

The House Oversight Committee has broad investigative powers and could request documents, hold hearings, and call witnesses to testify. The investigation could also lead to action from agencies such as the CFTC or the Department of Justice.

The outcome may help decide how insider trading laws apply to prediction markets in the future. Regardless of the final result, the industry is now facing much closer attention from Congress and federal regulators.