Study warns of insider trading crisis on Polymarket defense bets
A report by Anti-Corruption Data Collective finds Polymarket's military and defense prediction markets exhibit abnormal win rates for longshot bets, suggesting insider trading. Analysis of Iran strike contracts shows concentrated profits; 8 wallets earned $1.8M. Calls for stricter identity checks and debate on allowing such betting.
Quick Take
Report analyzed 435K Polymarket markets and $54B in cumulative volume.
Military-linked longshot bets win >50% of time, far above typical 14%.
Before June 2025 Iran strike, 19 bets totaling $164K made, earning $1.8M profit.
ACDC recommends identity verification and restrictions on sensitive policy markets.
Market Impact Analysis
NeutralNegative findings could lead to regulatory crackdown on prediction markets, but limited direct impact on crypto assets overall.
Speculation Analysis
Key Takeaways
- Polymarket military contracts show longshot win rates above 50%, a 4x anomaly from the 14% baseline.
- Eight wallets earned $1.8 million from $164,000 in bets placed right before the June 2025 Iran strikes.
- Report demands identity verification and restrictions on sensitive defense and policy markets.
- Findings add to evidence that a tiny fraction of traders captures most Polymarket profits.
What Happened
The Anti-Corruption Data Collective (ACDC) dropped a bombshell report alleging widespread insider trading on Polymarket’s military and defense prediction markets. After crunching over 435,000 contracts and $54.4 billion in volume since 2021, researchers found low-probability bets on defense outcomes win far more often than chance allows. The pattern exploded into plain view around the June 2025 U.S. strikes on Iran. A handful of wallets placed $164,292 in longshot bets hours before the attack, turning an information edge into $1.8 million in profits. The Pentagon had designed the operation to be unreadable, but a small group knew exactly what was coming.
The Numbers
Across all political markets, longshot bets—those with low implied probability—typically succeed 14% of the time. In military-linked contracts, that figure spikes beyond 50%. For the Iran strike case, 19 bets totaling just over $164,000 were placed on the contracts that resolved YES. Eight wallets split $1.8 million in profit, with one taking nearly $500,000. The disparity is too large to explain by luck alone. Separately, other research shows fewer than 1% of wallets capture about half of all Polymarket gains.
Why It Happened
Policy markets, especially those tied to military action, rely on public information that is inherently incomplete. Classified planning creates a gap that insiders can exploit. Without strict identity checks, traders with confidential knowledge can place large, well-timed bets and consistently beat the odds. The ACDC report argues these information asymmetries make defense prediction markets magnets for abuse. The platform’s surveillance teams have caught some bad actors, but the structural vulnerability remains.
Broader Impact
The findings may intensify regulatory scrutiny on prediction platforms like Polymarket and Kalshi. Lawmakers could debate whether betting on military outcomes and sensitive policies should exist at all. The report also strengthens calls for mandatory identity verification and rules that bar trading in markets prone to insider manipulation. A crackdown would reshape how event contracts operate, potentially limiting their scope but restoring trust.
What to Watch Next
- Regulatory responses—will the CFTC or other agencies open investigations or propose new rules?
- Platform reforms—will Polymarket roll out stricter KYC or restrict military-related contracts?
- Market behavior—do volumes in sensitive markets drop as traders fear enforcement?
This article is for informational purposes only and does not constitute financial advice.
Always late to trends?
Join for the latest news, insights & more.
Disclaimer: Bytewit is an independent media outlet that delivers news, research, and data.
© 2026 Bytewit. All Rights Reserved. This article is for informational purposes only.
