Polymarket Traders’ Timely US-Iran Ceasefire Bets Yield $480,000, Raise Insider-Trading Questions

U.S. Army soldier Gannon Ken Van Dyke is accused of using classified information obtained through his role in Operation Absolute Resolve to trade Polymarket event contracts tied to Venezuela and Nicolás Maduro. The Justice Department and the Commodity Futures Trading Commission brought parallel criminal and civil actions on April 23, 2026. The case is an early test of whether prediction-market contracts qualify as swaps under the Commodity Exchange Act and whether federal insider-trading rules extend to wagers based on confidential government information.

Prosecutors say Van Dyke placed roughly $33,000 in trades between Dec. 27, 2025, and Jan. 26, 2026, earning about $409,881; he has pleaded not guilty. The CFTC sought permission on Aug. 21 to file an amicus brief arguing the contracts were swaps within its jurisdiction. Van Dyke’s lawyers objected on Aug. 24, accusing the regulator of using the criminal case as a back door to advance its own enforcement position. Judge Margaret M. Garnett allowed the brief that day and gave the parties until Sept. 9 to submit supplemental responses.

Gannon Ken Van Dyke, a U.S. Army Special Forces master sergeant, is accused of using classified information gained while planning and carrying out Operation Absolute Resolve to trade event contracts on blockchain-based Polymarket. The case is the Commodity Futures Trading Commission’s first insider-trading action involving event contracts and its first use of the “Eddie Murphy Rule” against misuse of government information. Its outcome could help determine whether such contracts qualify as swaps under the Commodity Exchange Act, shaping federal oversight of fast-growing prediction markets.

U.S. District Judge Andrew L. Carter Jr. in Manhattan on Aug. 10 allowed the Justice Department to intervene and stayed the CFTC’s civil case, filed April 23, until the parallel criminal proceeding ends. The regulator alleges Van Dyke bought more than 436,000 “Yes” shares between Dec. 30, 2025, and Jan. 2, 2026, spending about $33,000 and generating more than $404,000 in profit on contracts tied to Nicolás Maduro’s removal. Van Dyke has pleaded not guilty to five criminal counts, including commodities fraud and wire fraud.

A ceasefire agreement between the US and Iran has shifted attention from the immediate halt in hostilities to whether both sides can prevent a renewed confrontation. Prices on decentralized prediction market Polymarket represent traders’ collective assessment of possible outcomes, making the platform a closely watched gauge of confidence in the truce and the geopolitical risks surrounding it.

On July 29, the Polymarket-implied probability that the US-Iran ceasefire would last at least 14 days fell 10%, signaling growing doubts about the agreement’s durability. Traders on rival prediction platform Myriad also broadly expect peace talks to begin no earlier than August, suggesting markets see limited prospects for an immediate diplomatic breakthrough despite the pause in fighting.

Polymarket allows traders to use crypto assets to wager on outcomes ranging from elections to economic events, with contract prices often treated as real-time measures of collective expectations. The decentralized prediction market relies heavily on transparent blockchain records and wallet activity to establish credibility, making signs of trading on nonpublic information or coordinated bets a significant test of market integrity and a potential focus for regulators.

A Bloomberg Businessweek analysis flagged about $200 million of Polymarket trading during the first half as potentially linked to insider activity. The top 1% of profitable accounts captured more than half of all gains, while over 50% of winning wallets were created within 24 hours before placing their bets. Some traders also appeared to split positions across multiple related wallets before withdrawing proceeds through Coinbase, intensifying scrutiny of the platform’s fairness.

Polymarket lets users trade on event outcomes using crypto assets. Military operations involve undisclosed national security information, and advance bets by people with inside knowledge could undermine market integrity and operational secrecy. The U.S. Commodity Futures Trading Commission warned on February 25, 2026, that trading event contracts using material nonpublic information may be illegal.

Before the United States struck Iran on February 28, 2026, six newly created accounts correctly bet that an attack would occur by the end of February, earning more than $1.2 million in combined profits. The contract drew nearly $90 million in trading volume, while related markets amassed more than $529 million. On May 18, Bubblemaps also said nine linked accounts had won 98% of more than 80 military-related bets, generating $2.4 million in total profits. The conflict also pushed Bitcoin lower and Hyperliquid oil futures higher.

Polymarket allows users to wager crypto assets on event outcomes. Although its onchain transactions are publicly visible, the offshore platform does not require identity verification. After onchain investigator ZachXBT said he would expose insider trading at a crypto company, a market opened for users to guess the company’s identity. Ironically, advance information may itself have leaked in the market betting on an insider-trading investigation.

On Feb. 26, 2026, ZachXBT identified Axiom as the subject of the investigation, alleging that its employees may have misused internal tools to track users’ wallets. The prediction market had recorded about $40 million in trading volume since Feb. 23. Lookonchain found that at least 12 newly created wallets had bet on Axiom in advance, earning more than $1 million in total, including $411,000 for one wallet. Axiom has revoked the relevant access and is investigating a possible leak.