Prediction Markets Face Scrutiny Over Insider Trading

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  • March 14, 2026 at 7:34 AM ET
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Key Takeaways

Prediction markets like Kalshi and Polymarket are under scrutiny for potential insider trading involving U.S. officials and sensitive information, particularly regarding war-related events.

  • Sen. Jeff Merkley introduced legislation to ban federal officials from trading prediction market bets.
  • The CFTC regulates most prediction markets but faces challenges with international platforms like Polymarket.
  • Critics highlight risks of manipulation by anonymous insiders with access to non-public information, citing coordinated betting patterns tied to government decisions.
  • Proponents argue that properly regulated prediction markets can serve as useful indicators of collective expectations.

Prediction markets like Kalshi and Polymarket are facing increased scrutiny over potential insider trading involving U.S. officials and sensitive information. These platforms allow users to bet on political events, including wars and regime changes, raising concerns about the risk of insider trading and the lack of oversight.

Sen. Jeff Merkley (D-Ore.) introduced legislation that would ban members of Congress, the president, and vice president from buying or selling prediction market bets. The bill aims to address the lack of current government ethics guidance on reporting gains from these markets. According to Merkley, there is no requirement for lawmakers or their staff to report event contract gains, creating a "massive blind spot" in financial disclosure rules.

The Commodity Futures Trading Commission (CFTC) regulates most prediction markets, including Kalshi. However, Polymarket operates internationally and does not require user identification, making it more susceptible to insider trading concerns. The CFTC has issued guidance asserting its control over these markets but has not responded to questions about investigations involving U.S. officials.

Critics argue that prediction markets are vulnerable to manipulation by anonymous insiders with access to non-public information. Evidence suggests coordinated betting patterns tied to government foreign policy decisions, such as bets on the removal of Venezuelan President Nicolás Maduro and the U.S.-Israeli attacks on Iran. The lack of regulatory clarity about whether insider trading in prediction markets is illegal creates significant loopholes.

Despite these concerns, proponents argue that prediction markets can serve as useful indicators of collective expectations when properly regulated. Economists and market observers maintain there is value in monitoring prediction market data for potential news and trends. However, the perception of a rigged market could put off users, slowing the platforms' growth.

Prediction markets have seen explosive growth, with over $44 billion in trades hosted on these platforms. While much of the activity revolves around sports betting, users can also speculate on political events and other future occurrences. The apps gained significant traction during the 2024 U.S. presidential campaign after a legal victory allowed them to accept election bets.

However, it is the more gruesome wagers tied to military actions involving Iran, Venezuela, and Israel that have drawn recent attention. Critics argue these bets run afoul of U.S. financial rules, which bar trading on contracts involving war, terrorism, assassination, gaming, or other illegal activities. Despite this, firms like Polymarket have hosted millions of dollars in bets related to such events.

Polymarket has faced scrutiny for offering bets on high-profile events, including the removal of Iran's Ayatollah Ali Khamenei and potential nuclear detonation. The company eventually removed some markets after drawing public attention but continues to allow bets on other sensitive topics. Kalshi, another major player, has also canceled certain markets and announced measures to combat insider trading.

Critics have called for a crackdown on these platforms, arguing that they facilitate unseemly and potentially illegal war profiteering. They highlight national security risks and the potential for insider trading and corruption. The Public Citizen advocacy group recently filed a complaint over the bets, describing them as "gruesome."

The regulatory landscape remains uncertain. While some Democrats have introduced legislation to bar federal officials from trading event contracts, the Biden administration's initial hard line on the sector has softened following a court defeat and the 2024 election of Donald Trump. The CFTC has withdrawn proposed bans on sports and politics-related contracts and sided with prediction market firms in legal battles against states.

As pressure mounts, platforms like Polymarket and Kalshi have announced steps to police suspicious activity more formally. Kalshi, which advertises its status as a "regulated exchange," has opened investigations into insider trading cases and canceled markets tied directly to death or other sensitive topics.

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