Polymarket’s Iran-related prediction markets have become the platform’s biggest draw, with the flagship “US strikes Iran by…?” contract alone accumulating over $529 million in total volume by March 1, 2026. The surge didn’t happen in a vacuum. Escalating US-Iran military tensions in late February drove a frenzy of speculative activity, with sub-market trading volumes hitting $89.6 million on February 28 alone. Polymarket’s weekly volumes exceeded $425 million in early March, turning the platform into something resembling a real-time geopolitical sentiment engine.

The insider trading problem no one can ignore

On-chain analytics firm Bubblemaps identified clusters of newly created wallets that appeared to time their bets with uncanny precision, placing wagers immediately before key announcements about strikes and ceasefires. Those wallet clusters recorded profits between $1 million and $1.2 million.

By May 2026, Congress took notice. Lawmakers initiated probes targeting Polymarket specifically over concerns that insider trading involving government and military events was occurring on the platform. The investigations are focused on whether individuals with access to classified or privileged information about US military operations used prediction markets to profit from that knowledge.

Scale that keeps growing

By mid-June 2026, Polymarket was operating over 170 active markets associated with Iran, covering everything from strike timelines to ceasefire dates to regime change scenarios. Post-strike markets proved equally popular. Contracts focused on peace-related outcomes attracted between $170 million and $361 million in volume.

Polymarket still hasn’t launched a native token, though speculation about future platform upgrades and stability measures has circulated. The platform continues to operate on Polygon, processing bets denominated in USDC, which means every trade leaves a transparent on-chain trail.

What this means for prediction market investors

Congressional investigations tend to produce legislative outcomes. If lawmakers determine that prediction markets are being exploited by government insiders, the response could range from requiring KYC verification for large bets to outright restrictions on markets tied to military or national security events. Bubblemaps’ analysis showed that on-chain forensics can identify suspicious wallet clusters with relative ease.

Competitors like Kalshi, which operates under CFTC oversight, may benefit if Polymarket faces restrictions, positioning regulated alternatives as safer venues for institutional interest.