Author: oscar

Prediction Markets Face Reckoning as Lawmakers Target the Industry

Polymarket and Kalshi, the two largest prediction market platforms in the United States, announced sweeping new insider trading bans on Monday in a coordinated effort to get ahead of federal legislation that could fundamentally reshape — or even dismantle — key parts of their business.

The moves come as Sens. Adam Schiff (D-Calif.) and John Curtis (R-Utah) introduced bipartisan legislation called the “Prediction Markets are Gambling Act,” which would ban prediction markets from offering contracts related to sports. If enacted, the bill could severely curtail the future growth prospects of both platforms, which have been aggressively expanding into sports-related markets over the past year.

What the New Rules Prohibit

Polymarket’s updated rulebook, published Monday across both its global decentralized finance (DeFi) platform and its Commodity Futures Trading Commission (CFTC)-regulated U.S. exchange, codifies explicit bans on three categories of insider trading. First, users are now prohibited from trading on any contract if they possess confidential information about the outcome of the underlying event, where using that information would violate a preexisting duty of trust or confidence. Second, users cannot trade on confidential tips received from someone who owed a duty of confidence to a third party. Third, anyone who holds a position of authority or influence sufficient to affect the outcome of an event is barred from placing bets on that event.

Kalshi took a slightly different approach, announcing it would preemptively block political candidates from trading on their own campaigns and ban anyone involved in college or professional sports from trading on contracts related to the sports they play or are employed by.

Suspicious Bets Sparked the Crackdown

The industry-wide push for stronger guardrails did not happen in a vacuum. Over the past several months, prediction markets have faced intense scrutiny after a series of suspiciously well-timed bets drew the attention of lawmakers, regulators, and the media.

One Polymarket trader operating under the username “Magamyman” made more than $553,000 by placing bets related to Iran and its Supreme Leader, Ayatollah Ali Khamenei, just before an Israeli strike killed him. The account appeared to have profited from advance knowledge of military action in the region. Similarly, other traders placed large, profitable wagers ahead of the capture of former Venezuelan President Nicolás Maduro, further raising alarms about potential information leaks from government or intelligence sources.

Sen. Jeff Merkley (D-Ore.) was among the first to sound the alarm, describing the activity as insider trading conducted openly and proposing legislation in early March to ban government officials from participating in prediction markets entirely.

Polymarket Builds Out Its Enforcement Infrastructure

Beyond updating its rulebook, Polymarket has invested heavily in enforcement technology. The company’s U.S. exchange now operates a three-tier surveillance structure that includes a trade surveillance technology partner, a real-time control desk, and a Regulatory Services Agreement with the National Futures Association (NFA). Violations can result in suspension, monetary penalties, or referral to law enforcement.

Earlier this month, Polymarket also announced a partnership with Palantir and TWG AI to build a comprehensive surveillance platform designed to detect suspicious trading patterns and manipulation in sports prediction markets. Polymarket CEO Shayne Coplan said the goal is to bring world-class analytics and monitoring to sports markets while maintaining the confidence of leagues and teams in the integrity of games.

The timing of these investments is no coincidence. Just four days before Monday’s rule update, Polymarket was named Major League Baseball’s exclusive prediction market partner in a landmark deal announced March 19. The partnership gives Polymarket and its brokers exclusive access to MLB logos, official data from Sportradar, and brand exposure across the league’s digital ecosystem. As part of the agreement, MLB also signed a first-of-its-kind Memorandum of Understanding with the CFTC to share information and establish an integrity framework for prediction markets in professional sports.

An Industry at a Crossroads

The prediction market sector experienced explosive growth in 2025, with total trading volume increasing fourfold to $60 billion. MLB joined the NHL, MLS, and the UFC as North American sports leagues that have signed commercial partnerships with prediction market platforms, signaling growing mainstream acceptance.

But the bipartisan legislation introduced Monday threatens to reverse that momentum. The “Prediction Markets are Gambling Act” would effectively destroy much of Kalshi and Polymarket’s sports-related business if it becomes law. The platforms are betting that by proactively self-regulating and demonstrating robust integrity controls, they can persuade lawmakers that the industry can police itself without heavy-handed federal intervention.

Whether that strategy will succeed remains an open question. With multiple senators from both parties now engaged on the issue and public scrutiny intensifying after the Iran and Venezuela betting scandals, the prediction market industry faces perhaps its most consequential moment since Polymarket’s breakout during the 2024 presidential election cycle.

For now, the message from both Polymarket and Kalshi is clear: the era of unregulated, anything-goes prediction markets is over. The question is whether the industry will be allowed to write its own rules — or whether Congress will write them instead.

Polymarket, the world’s largest prediction market platform, announced comprehensive market integrity rules on Monday covering both its decentralized finance (DeFi) platform and its Commodity Futures Trading Commission (CFTC)-regulated U.S. exchange. The move comes after a string of high-profile incidents raised serious questions about whether traders with insider knowledge had been using the platform to profit from classified government intelligence and geopolitical events.

What the New Rules Actually Prohibit

The updated rulebook introduces three explicit categories of prohibited insider trading conduct that apply to all participants on both platforms. First, traders may not act on stolen confidential information about the outcome — or likely outcome — of an underlying event where doing so would violate a preexisting duty of trust or confidence owed to another party. Second, the rules extend liability to so-called “tippees”: anyone who receives confidential information from a person who was themselves prohibited from trading on it, and who knew or had reason to know that the source was bound by such a duty. Third — and perhaps most consequentially — traders are barred from placing any bet if they hold a position of authority or influence sufficient to actually affect the outcome of the event being wagered on.

Beyond insider trading, both platforms explicitly prohibit all forms of market manipulation, including spoofing, wash trading, and fictitious transactions, as well as self-dealing, front-running, information misuse, attempted manipulation, and any disruptive practices that undermine orderly market operations.

A Pattern of Suspicious Bets That Forced Polymarket’s Hand

The rule overhaul did not emerge in a vacuum. Over the past year, Polymarket has been at the center of several alarming episodes where trading patterns suggested participants may have possessed advance knowledge of classified military or government actions.

In June 2025, during the 12-day war between Israel and Iran, Israeli prosecutors filed criminal indictments against an Israel Defense Forces reservist and a civilian who allegedly used classified military intelligence to place bets on Polymarket about upcoming strikes on Iran. The two individuals reportedly earned over $150,000 in combined profits before Israeli authorities caught up with them — marking what may be the first criminal case of its kind involving a prediction market.

Then, in late February 2026, an account trading under the username “Magamyman” made more than $553,000 by placing well-timed bets related to Iran’s Supreme Leader, Ayatollah Ali Khamenei, just hours before an Israeli strike killed him. Blockchain analysis firm Bubblemaps identified six newly created Polymarket accounts that collectively placed bets shortly before the February 28 airstrikes, winning approximately $1.2 million in total. The accounts had been opened mere hours before the bets were placed, raising obvious red flags.

Earlier in January 2026, an anonymous user had already attracted attention by placing a $32,537 wager on the removal of Venezuelan leader Nicolás Maduro from power — at a time when the platform’s own odds implied only a 6.5% probability of that outcome. The trader had joined the platform just days before the bet, and the timing proved uncannily accurate.

How Enforcement Will Work Across Both Platforms

Polymarket says it has built a multi-layered compliance infrastructure to back the new rules. On the DeFi side, the platform leverages the inherent transparency of the Polygon blockchain, where all trades are publicly visible on-chain and every position in each contract is viewable on polymarket.com. Polymarket also partners with third-party surveillance and technology specialists to monitor for unusual activity.

The U.S. exchange operates under a more formal three-tier surveillance regime: external partnerships with trade surveillance specialists, an internal control desk conducting real-time monitoring, and a Regulatory Services Agreement with the National Futures Association (NFA) to detect potential rule violations and sanction offenders. Users who spot suspicious activity on the DeFi platform can report it via the Polymarket Discord or by emailing [email protected], while U.S. exchange participants can file confidential reports to [email protected].

When Polymarket identifies questionable trading patterns, it may initiate a formal review and pursue disciplinary measures ranging from banning wallet addresses to referring cases to law enforcement agencies.

Polymarket’s CLO Speaks Out

“Markets thrive on clarity,” said Neal Kumar, Polymarket’s Chief Legal Officer. “These rule enhancements make our expectations abundantly clear for every participant across both platforms and highlight the compliance infrastructure we have already built.”

Alongside the rulebook update, Polymarket launched dedicated Market Integrity pages on both platforms, designed to explain how the rules operate in practice and provide easy access to reporting tools for suspicious activity.

Why This Matters for the Future of Prediction Markets

Polymarket’s move is significant not just for the platform itself, but for the broader prediction market industry, which has long argued that markets aggregate dispersed information to generate accurate forecasts. That value proposition depends critically on the assumption that participants are trading on publicly available information and genuine beliefs — not on stolen government secrets or classified military intelligence.

The repeated insider trading incidents of the past year have put that assumption under strain and attracted scrutiny from regulators, lawmakers, and the public. By publishing explicit, enforceable rules aligned with both DeFi norms and CFTC regulations, Polymarket is making a calculated bet that proactive compliance will protect its legitimacy and its CFTC-regulated U.S. exchange — which represents a major strategic asset as the platform seeks to expand its footprint with American institutional participants.

Whether the new rules will be enough to deter sophisticated actors with access to classified information remains an open question. But for a platform that handles hundreds of millions of dollars in wagers on some of the world’s most sensitive geopolitical events, the attempt to draw a clear legal and ethical line is an overdue step forward.