Polymarket Pulls Nuclear Detonation Betting Markets After Public Backlash

TLDR

• Polymarket has removed markets that let users bet on whether a nuclear weapon would detonate by set dates
• The removal comes during the current conflict with Iran and growing criticism over war-related insider trading
• One 2023 contract implied up to a 19% chance of nuclear detonation; a 2025 contract traded near 12%
• The 2025 contract alone recorded over $1.7 million in trading volume
• The U.S. CFTC is considering rules that would ban regulated exchanges from listing war and terrorism event contracts

Polymarket has quietly removed prediction markets that allowed users to bet on the probability of a nuclear weapon detonating. The move follows public criticism tied to the ongoing conflict with Iran and broader concerns about insider trading on military events.

The contracts had been live on the platform for years. They asked users to assign a probability to whether a nuclear weapon would detonate before specific dates, and historically resolved to “No.”

At one point in 2023, one such contract implied roughly a 19% chance of nuclear detonation before year-end. That figure drew attention at the time given the level of implied risk priced into the market.

A later contract expiring in June 2025 traded near 12%. These were not low-traffic markets — they attracted real money from real users over extended periods.

The 2025 nuclear detonation contract recorded more than $1.7 million in total trading volume. The earlier 2023 version drew close to $700,000 in wagers.

The removal of these markets follows a separate controversy on Polymarket. A trader reportedly made over $400,000 betting on Venezuelan leader Nicolás Maduro’s removal shortly before the U.S. operation that led to his capture.

That incident raised questions about whether insiders could use prediction markets to trade ahead of military actions. Critics argued that such markets could reward those with advance knowledge of government decisions.

The same concerns are now being applied to the Iran conflict and whether any traders held an information advantage before hostilities began.

CFTC Eyes New Rules on War and Terror Contracts

The Commodity Futures Trading Commission proposed rules in 2024 that would prevent regulated exchanges from listing event contracts tied to war, terrorism, or assassination. The agency described these as activities contrary to the public interest.

CFTC Chairman Mike Selig has said the Commission plans to issue clearer guidance on prediction markets in the near future. No final rules have been published yet.

Polymarket operates outside of traditional regulated exchange structures, but the regulatory pressure appears to be influencing how the platform manages its listings.

The platform has not issued a formal public statement explaining the removal of the nuclear detonation markets. The contracts simply no longer appear on the site.

Nuclear weapon-themed prediction markets are not new in the space. Platforms have offered similar contracts during periods of elevated geopolitical tension in the past.

The combination of the Iran conflict, the Maduro trading controversy, and the active CFTC rulemaking process appears to have created enough pressure for Polymarket to act. The platform removed the contracts without announcement.

The CFTC’s proposed rules remain under review as of early March 2026.

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