Prediction markets — once an academic curiosity — have become a $150 billion cumulative-volume industry dominated by two platforms: Kalshi ($22 billion valuation, $1.5 billion annualized revenue) and Polymarket ($15 billion valuation, fee model introduced March 2026). Combined monthly notional vo...
"There's a concern now that members of Congress, members of the president's administration, any type of government employee, can use basic insider knowledge and make huge profits on anything government related." — Rep. James Comer (R-Ky.), Chairman, House Oversight and Government Reform Committee
Prediction markets — once an academic curiosity — have become a $150 billion cumulative-volume industry dominated by two platforms: Kalshi ($22 billion valuation, $1.5 billion annualized revenue) and Polymarket ($15 billion valuation, fee model introduced March 2026). Combined monthly notional volume peaked at $26.75 billion in January 2026, a 13-fold increase from March 2025.
That growth has attracted congressional scrutiny that now threatens the sector's regulatory standing. On May 22, 2026, House Oversight Chairman James Comer opened a formal investigation into insider trading on both platforms, requesting documents by June 5. The probe follows a string of enforcement actions: a U.S. Army Green Beret arrested for making $400,000 on classified Venezuela intelligence, nine linked accounts earning $2.4 million on Iran military bets with a 98% win rate, and three congressional candidates suspended for wagering on their own races. Researchers estimate at least $143 million has been earned through insider information on Polymarket alone between 2024 and 2026.
The sector faces a regulatory pileup: the DEATH BETS Act to ban war-related contracts, the Senate's unanimous self-imposed trading ban, the Prediction Market Act of 2026 establishing bipartisan oversight, and an unresolved CFTC-versus-states jurisdictional battle that has produced conflicting court rulings across multiple circuits. This report examines the economic structure of the prediction market industry, the evidence of insider trading, and the regulatory responses that may reshape it.
The prediction market sector generated cumulative volumes exceeding $150 billion through early 2026, according to Yahoo Finance. Monthly volume peaked at $26.75 billion in January 2026. April 2026 taker volume registered $8.6 billion, with Kalshi capturing $5.42 billion (63%) to Polymarket's $1.99 billion (23%), per Bitcoin News.
Kalshi operates as a CFTC-regulated designated contract market (DCM). Its valuation doubled in five months to $22 billion as of May 2026, according to TechCrunch. The platform reports approximately $1.5 billion in annualized revenue at a roughly 1% take rate across event categories including politics, economics, sports, and geopolitics. Kalshi holds approximately 90% U.S. market share, per industry trackers.
Polymarket runs on the Polygon blockchain and historically charged no trading fees. The platform introduced a tiered taker-fee model in March 2026: 7.2% on crypto markets, 3% on sports, 4% on politics/finance/technology, and 5% on economics/culture. Despite lower volume, Polymarket maintains a user-count advantage: 678,342 unique users in April 2026, more than eight times Kalshi's implied user base, according to DeFi Rate.
The revenue model divergence is significant. Kalshi's regulated exchange structure generates consistent fee income. Polymarket's delayed monetization — running fee-free for years — mirrors the Web3 growth-subsidy model identified in webthreepedia's foundational analysis, where platforms defer revenue capture in favor of user acquisition, raising questions about long-term economic sustainability absent fee revenue.
The evidence base for systematic insider trading on prediction markets has grown from anecdotal to statistical.
The Van Dyke Case (April 2026). Master Sergeant Gannon Ken Van Dyke, a U.S. Army Special Forces operator stationed at Fort Bragg, was arrested on April 23, 2026 for using classified information to profit from prediction market bets. According to the Department of Justice, Van Dyke created a Polymarket account on December 26, 2025, and placed 13 bets through January 2 on contracts tied to U.S. military operations in Venezuela — including whether forces would land in Venezuela, remove Maduro, and invade the country. He netted over $400,000 from Operation Absolute Resolve, the January 3 mission to capture Venezuelan President Nicolas Maduro. Van Dyke was charged with three counts of violating the Commodity Exchange Act, one count of wire fraud, and one count of unlawful monetary transaction. He also attempted to delete his Polymarket account and changed his cryptocurrency email to an unregistered address. This marked the first time the CFTC filed insider trading charges in connection with event contracts.
The Iran Cluster (February–April 2026). Blockchain analytics firm Bubblemaps identified a cluster of 80 highly accurate bets on U.S. military actions against Iran on Polymarket. Nine connected accounts accumulated $2.4 million in winnings with a 98% win rate across these bets, according to CBS News. Multiple wagers were placed when the odds of winning were low — in some cases, hours before U.S. and Israeli strikes in Iran. The firm's CEO stated that "luck alone cannot explain those numbers." Separately, 50 newly created accounts placed large bets on a U.S.-Iran ceasefire in the hours before President Trump announced the April 7 ceasefire on Truth Social, with some accounts reaping hundreds of thousands of dollars.
Systemic Scale. Researchers flagged more than 200,000 suspicious bets and estimated that at least $143 million was earned using insider information on Polymarket between 2024 and 2026, according to reporting by the New York Times. Over $500 million was wagered on the timing of U.S. military strikes on Iran alone, according to Senator Adam Schiff's office.
Self-Dealing by Candidates. In April 2026, Kalshi suspended three political candidates for betting on their own races: Minnesota state Sen. Matthew Klein (D), Virginia independent Mark Moran, and Texas Republican Zeke Enriquez. The trades were small — Klein bet $50, Enriquez less than $100 — but all three received five-year suspensions. Separately, NPR reported that campaign staffers told the outlet they had made "thousands" betting on their own candidates.
The insider trading problem extends beyond financial fraud into national security territory.
The Council on Foreign Relations published an analysis arguing that geopolitical prediction markets "offer an unprecedented incentive for national security insiders to leak classified information" and create "uniquely transparent venues for adversaries to exploit those leaks." The concern is two-directional: insiders can profit by trading on classified knowledge, and foreign adversaries can mine prediction market price movements for signals about impending U.S. military operations.
War on the Rocks, a defense policy publication, published an analysis titled "Betting on War: Prediction Markets and the Corruption of National Security," arguing that the markets create a structural incentive for intelligence compromise. Military Times reported that "unregulated prediction markets may endanger U.S. national security," citing expert assessments that betting activity could reveal operational timelines to adversaries monitoring the platforms.
The Van Dyke case illustrated the direct mechanism: a Special Forces operator with access to operational planning used that access to extract $400,000 on a blockchain-based platform with minimal identity verification. According to CoinDesk, the case demonstrated that "crypto prediction markets are turning into dangerous national security risks."
The legislative and regulatory response has been rapid and bipartisan:
March 11, 2026: Rep. Mike Levin (D-CA) and Sen. Adam Schiff (D-CA) introduce the DEATH BETS Act (Discouraging Exploitative Assassination, Tragedy, and Harm Betting in Event Trading Systems Act), which would impose an unequivocal ban on any CFTC-registered entity listing contracts that involve, relate to, or reference terrorism, assassination, war, or death.
March 23, 2026: Senators John Curtis (R-UT) and Adam Schiff (D-CA) introduce the Prediction Markets Are Gambling Act, which would amend the Commodity Exchange Act to reclassify sports and casino-style event contracts as gambling outside CFTC jurisdiction.
April 23, 2026: DOJ arrests Master Sergeant Van Dyke. CFTC files first-ever insider trading charges on event contracts.
April 30, 2026: The U.S. Senate unanimously passes a rule barring senators and staff from trading on prediction markets, effective immediately. Led by Sen. Bernie Moreno (R-OH), the resolution passed without a roll call vote.
April 30, 2026: Democrats urge the CFTC to take action on prediction market sports betting and insider trading, per CNBC.
May 2026: Senators Kirsten Gillibrand (D-NY) and Dave McCormick (R-PA) introduce the Prediction Market Act of 2026, bipartisan legislation establishing regulatory clarity and consumer protections.
May 22, 2026: House Oversight Chairman James Comer opens a formal investigation into Kalshi and Polymarket, requesting documents on identity verification, geographic restrictions, and anomalous trading detection by June 5.
The regulatory framework is fractured. The CFTC claims exclusive federal jurisdiction over event contracts under the Commodity Exchange Act. Multiple states classify prediction markets as illegal gambling.
In February 2026, the CFTC filed amicus briefs with five states defending its exclusive jurisdiction. In April 2026, the Third Circuit became the first federal appellate court to hold that the CEA preempts state gambling laws for sports-related event contracts traded on CFTC-registered DCMs. However, state enforcement continues: Arizona filed 20 criminal counts against Kalshi on March 17, 2026. The CFTC obtained a temporary restraining order on April 10, blocking the Arizona criminal case.
Nevada, Massachusetts, and Tennessee have also pressed enforcement actions against Kalshi. A federal court in Tennessee sided with Kalshi, granting a preliminary injunction and finding its sports event contracts are likely swaps under exclusive federal jurisdiction. The conflicting rulings across circuits make Supreme Court review a possibility.
The CFTC's rulemaking on event contracts remains open, with a comment period that closed April 30, 2026. The regulatory outcome will determine whether prediction markets operate as federally supervised derivatives exchanges or fall under state gambling regimes — a distinction that could determine the viability of platforms' current business models.
| Metric | Kalshi | Polymarket | |---|---|---| | Valuation (2026) | $22 billion | ~$15 billion | | Annualized Revenue | ~$1.5 billion | Newly monetizing | | April 2026 Volume | $5.42 billion | $1.99 billion | | U.S. Market Share | ~90% | Limited (non-U.S. focus) | | Unique Users (April) | ~85,000 (implied) | 678,342 | | Regulatory Status | CFTC-regulated DCM | Unregulated (Polygon-based) | | Fee Model | ~1% take rate | Tiered taker fees (3-7.2%) | | Identity Verification | KYC required | Minimal (crypto wallets) | | Insider Trading Cases | 3 candidates suspended | Van Dyke arrest, Iran cluster |
The economic structure divergence is notable. Kalshi's regulated status provides legal defensibility but also exposes it to state enforcement actions. Polymarket's crypto-native architecture — minimal identity verification, blockchain settlement — enabled the national security breaches that now threaten the entire sector. The Van Dyke case exploited precisely the kind of pseudonymous access that distinguishes decentralized prediction markets from regulated exchanges.
From an economic value perspective, the prediction market sector exhibits characteristics common to high-growth Web3 segments: rapid volume growth driven by speculative activity, deferred monetization (Polymarket), regulatory arbitrage (offshore users), and a sustainability gap between market valuations ($22B and $15B respectively) and demonstrated ability to generate recurring fee income.
$150B cumulative volume has been traded on prediction markets through early 2026, with monthly peaks exceeding $26 billion. The sector's combined valuation exceeds $37 billion.
At least $143 million in Polymarket profits between 2024-2026 has been flagged as derived from insider information, with 200,000+ suspicious bets identified by researchers.
The Van Dyke arrest established the first-ever CFTC insider trading prosecution on event contracts, demonstrating that classified military intelligence can be monetized through crypto-native prediction platforms.
Congressional response is bipartisan and accelerating. The Senate unanimously banned its own members from prediction market trading. The House Oversight Committee has opened a formal investigation. At least four major bills target the sector.
Jurisdictional fragmentation between the CFTC and state gambling regulators remains unresolved, with the Third Circuit and Tennessee federal court supporting federal preemption while Arizona, Nevada, and Massachusetts pursue state enforcement.
The economic sustainability question mirrors broader Web3 patterns: Polymarket operated fee-free for years, Kalshi's revenue depends on volume that may be partially driven by insider activity, and both platforms' valuations assume continued regulatory permission to operate.
The prediction market sector has reached an inflection point. Platforms valued at a combined $37 billion now face the most comprehensive regulatory examination since the CFTC first approved event contracts. The evidence of insider trading has moved from isolated incidents to what researchers describe as "systemic" — with documented cases spanning military operations, political campaigns, and geopolitical events.
The economic fundamentals are intertwined with the regulatory risk. Kalshi's $1.5 billion revenue run rate and Polymarket's recent monetization both depend on continued ability to list contracts across politics, geopolitics, and other categories that are now the subject of proposed bans. If the DEATH BETS Act passes, geopolitical contracts — among the highest-volume categories — would be eliminated. If states succeed in classifying prediction markets as gambling, platforms would need state-by-state licensing, fragmenting the market.
The national security dimension adds urgency. When a Special Forces operator can use a crypto wallet to monetize classified operational intelligence, and when blockchain analysts can identify 80 accounts with a 98% win rate on military outcomes, the problem has moved beyond market integrity into intelligence compromise. The June 5 document deadline set by Chairman Comer will determine whether the congressional response escalates further.
The sector's trajectory will likely be determined by three outcomes: the CFTC's final rulemaking on event contracts, the fate of the DEATH BETS Act and Prediction Market Act in Congress, and whether the courts resolve the federal-state jurisdictional conflict. Until then, prediction markets operate in a regulatory gap where $26 billion in monthly volume flows through platforms whose legal status remains contested across multiple branches of government.