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How Do Prediction Markets Prevent Insider Trading?

Caleb Tallman
Caleb Tallman Editor in chief
10/19/2026
How Do Prediction Markets Prevent Insider Trading?

Picture this a YouTube editor finishes working on a video that won't go public until next week. The video reveals something people are actively trading contracts on, and the editor already knows exactly what's coming. If they use that information to trade before anyone else sees the video, the exchange could face serious problems.

Situations like this are why insider trading has become a major issue in prediction markets. With contracts covering everything from political elections to entertainment and economic announcements, many people might know something before the public does. The question is how exchanges figure out when someone has crossed the line.

Having Better Information isn't Always Cheating

One thing worth clearing up is that knowing more than another trader doesn't automatically mean you've done anything wrong. Someone who spends hours researching an election or studying economic reports might understand an event better than the average person. That's part of what makes prediction markets work.

The trouble starts when someone uses confidential information they aren't supposed to exploit. For example, an employee who knows the contents of an unreleased announcement may have access to information through their job that other traders don't have. Using that information can violate exchange rules and, depending on the circumstances, federal law.

There's another issue exchanges have to consider, too. Some people aren't just familiar with an event; they can actually influence what happens. A political candidate trading contracts about their own campaign creates a different kind of conflict that exchanges also need to address.

A Suspicious Trade Can Leave Clues

You might wonder how an exchange could know whether someone had advance information. After all, traders make accurate predictions all the time, and sometimes a well-timed trade is simply the result of good research. Exchanges must distinguish those situations from activity that warrants investigation.

Regulated platforms monitor trading behavior and look for patterns that don't seem typical. A compliance team might pay closer attention when an account suddenly makes a large trade just before a major announcement. Repeatedly successful trades involving confidential events can also raise questions.

Some of the things exchanges look for include:

  • Large positions opened shortly before important information becomes public.
  • Accounts with unusually consistent success on sensitive contracts.
  • Sudden changes in an individual's trading habits.
  • Several accounts appearing to coordinate their activity.
  • Traders with professional or personal connections to an event.

Kalshi has said it uses surveillance systems to spot unusual activity and investigate potential violations. A suspicious pattern doesn't prove someone had confidential information, though. Investigators still have to establish whether someone actually broke an exchange rule.

Your Identity Matters More Than You Might Think

When you sign up for a federally regulated U.S. prediction market exchange, you generally have to verify your identity. Those requirements serve several purposes, including helping platforms understand who is using their services. They also become valuable when questions arise about a particular trade.

Suppose someone buys contracts related to a television show's finale shortly before the episode airs. If investigators discover the account belongs to someone who works on the production, that connection could warrant a closer look. The same idea applies to someone involved in a political campaign or handling confidential economic information.

Exchanges can also prevent certain people from trading contracts where conflicts are particularly obvious. Kalshi has restrictions addressing individuals who can influence an event or possess relevant confidential information. Keeping those people out of specific markets can be more effective than waiting until questionable activity occurs.

Federal Regulators Have Enforcement Powers

The Commodity Futures Trading Commission (CFTC) oversees federally registered derivatives exchanges in the United States. That includes designated contract markets offering event contracts, which must maintain rules and procedures to monitor trading and address misconduct. Being a regulated exchange comes with responsibilities beyond simply providing a place to buy and sell contracts.

Federal commodities law also gives the CFTC authority to pursue certain fraudulent and manipulative practices. Improperly using confidential information obtained through a relationship of trust can potentially lead to enforcement action. However, the law doesn't treat every instance of someone having better information as insider trading.

Real Cases, Real Consequences

The first case involved a political candidate who traded contracts tied to his own candidacy in May 2025. Videos of the activity eventually appeared online, prompting Kalshi to investigate. The candidate acknowledged violating exchange rules and received a $2,246.36 financial penalty along with a five-year suspension.

The second involved an editor associated with a YouTube channel who traded contracts related to the channel's content. The individual apparently had access to information about videos before they were released publicly. Kalshi concluded there were reasonable grounds to believe confidential information had been improperly used and imposed a $20,397.58 financial penalty and a two-year suspension.

Neither situation involved the kind of corporate earnings information people typically associate with insider trading. One concerned a political candidate's own activity, while the other involved entertainment content that hadn't been released. That's part of what makes policing prediction markets unusual, since potentially sensitive information can come from so many different places.

There's No Perfect Way to Catch Every Violation

Even with monitoring systems in place, exchanges won't catch every questionable trade. Someone with confidential knowledge might trade in relatively small amounts or avoid activity that immediately attracts attention. A suspicious pattern can also have an innocent explanation, so careful investigation is necessary.

Some contracts pose additional challenges because the people involved can influence the outcome. Consider a market asking whether a public figure will use a particular phrase during a speech. Someone who controls the speech could affect the result, raising concerns beyond simply knowing something early.

This is why exchanges need several layers of protection rather than relying on a single monitoring system. Identity checks, contract restrictions, surveillance, and disciplinary procedures each serve different purposes. The protections also vary across platforms operating under different regulatory frameworks.

Frequently Asked Questions

Is insider trading against the law in prediction markets?

Certain forms of misconduct involving confidential information can violate federal commodities law. Other activities may violate an exchange's own trading rules without necessarily establishing a federal offense. How someone obtained and used the information matters.

How can an exchange tell if someone has inside information?

Exchanges examine unusual trading activity, account histories, and potential connections between traders and the events they trade on. They may also investigate tips or information that becomes public. No single suspicious trade automatically proves wrongdoing.

Are political candidates allowed to trade prediction markets?

Candidates may face restrictions on contracts involving events they can influence or information they possess through their campaigns. Individual exchange rules determine which activities are prohibited. Being a political candidate doesn't automatically prevent someone from trading every type of contract.

What penalties can someone face?

Depending on the violation, exchanges can impose financial penalties, suspend trading privileges, or permanently prohibit someone from participating. In some cases, violations can also trigger federal investigations or enforcement actions. The outcome depends on the conduct involved and the applicable rules.