By Elsie Kamsiyochi
The explosive rise of prediction markets has transformed the way investors, traders, and even political observers forecast major global events. But with that popularity has come a troubling trend: a sharp increase in suspicious trading activity that is raising concerns about insider information, market fairness, and regulatory oversight.
Leading prediction market platforms, including and , are reportedly seeing an unprecedented surge in questionable trades as user activity skyrockets. The development has placed the rapidly growing industry under intense scrutiny from regulators and lawmakers, who worry these platforms may become fertile ground for illegal betting based on confidential information.
According to sources familiar with the matter, Kalshi alone has flagged more than 400 suspicious trades since the start of 2026—more than double the total number it investigated during all of last year. Some of these cases were reportedly serious enough to be referred to the U.S. derivatives watchdog, the (CFTC), although specific details have not been disclosed.
Polymarket has reportedly experienced a similar spike in unusual activity, with insiders pointing to a major rise in flagged trades this year. While exact figures remain unavailable, the increase reflects growing concerns about how difficult it is to monitor users who may possess non-public or privileged information.
Prediction markets function differently from traditional stock exchanges. Instead of investing in companies or assets, users buy and sell contracts tied to the likelihood of real-world outcomes. Participants can place “yes” or “no” wagers on everything from elections and economic policy decisions to geopolitical events, sports outcomes, and even legislative developments.
Their appeal lies in their ability to aggregate public sentiment and informed speculation into measurable odds. In some cases, prediction markets have proven surprisingly accurate—sometimes outperforming traditional polling during elections or offering early clues about policy decisions before mainstream analysts react.
However, that same structure creates unique vulnerabilities.
Experts warn that individuals with access to confidential government, political, military, or corporate information may see prediction markets as easier opportunities to profit than traditional financial markets. Unlike stock trading, where insider access can often be traced back to company executives or employees, prediction markets cover a much wider range of events, making suspicious behavior significantly harder to detect.
Stanford Law professor noted that identifying insider trading in corporate finance is often easier because investigators can pinpoint who had access to material information. Prediction markets, by contrast, can involve political decisions, military operations, or policy announcements where the pool of potentially informed individuals is far broader and more difficult to track.
The growth of these platforms has been extraordinary. Kalshi recently reported that its annualized trading volume has more than tripled in the last six months, reaching approximately $178 billion. Meanwhile, Polymarket recorded monthly trading volumes of roughly $10.3 billion in April, a dramatic jump from $3.8 billion during the same period a year earlier.
This surge in activity has also boosted investor confidence in the businesses themselves. Kalshi recently secured a major funding round valuing the company at $22 billion—more than ten times its valuation less than a year ago. Polymarket is reportedly pursuing additional financing that could value the company at around $15 billion as it works to expand its U.S. operations following earlier launch delays.
Yet success has brought controversy.
Recent high-profile incidents have intensified calls for tighter regulation. Earlier this year, a U.S. Army soldier was charged after allegedly using confidential information to win roughly $400,000 through bets tied to the political future of Venezuelan leader . Meanwhile, Kalshi suspended three congressional candidates over allegations of “political insider trading,” underscoring the growing challenge of preventing abuse on the platforms.
In response, both Kalshi and Polymarket have begun strengthening safeguards. New rules now explicitly prohibit bets made using confidential information or illegal tips, while additional restrictions aim to prevent federal employees from trading on political outcomes connected to their work. Some controversial contracts—including war-related bets—have also been removed after public backlash.
Regulators are now moving more aggressively. The CFTC has begun shaping new rules specifically targeting prediction markets, while lawmakers continue debating whether these platforms should face tighter federal oversight. At the same time, several U.S. states are challenging who has authority to regulate them, creating an ongoing legal battle over jurisdiction.
Despite mounting scrutiny, experts believe the sector’s popularity is unlikely to fade anytime soon. Many investors increasingly rely on prediction markets for signals about elections, government policy, and geopolitical developments, viewing them as a potentially valuable forecasting tool.
But as billions of dollars continue flowing into these platforms, one question is becoming impossible to ignore: can prediction markets maintain credibility while preventing insider abuse? The answer may determine whether the industry evolves into a mainstream financial tool—or faces a regulatory crackdown that reshapes its future.
Source Reuters
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