Half a Billion Dollars Was Wagered on Polymarket On The Iran War. How Some Bettors Knew
Half a billion dollars was wagered on the timing of American bombs falling on Tehran. That sentence alone should be enough to reshape the regulatory conversation around prediction markets — but the details make it worse.
When the US and Israel launched strikes against Iran on February 28, Polymarket — the crypto-native prediction platform that rocketed to prominence during the 2024 election — had already processed $529 million in contracts tied to the timing of the attack. Six newly created accounts collectively pocketed roughly $1.2 million by betting correctly on the exact date, according to blockchain analytics firm Bubblemaps. Some of those wallets were funded just hours before the first explosions were reported in Tehran. The shares had been purchased at roughly ten cents on the dollar.
The most conspicuous winner was an account called “Magamyman.” The user turned approximately $87,000 into more than $515,000 by betting that strikes would land by February 28. The first trade was placed just 71 minutes before the news broke publicly, at a point when the platform priced the probability at 17 per cent. Magamyman then followed up by collecting an additional $553,000 wagering that Ayatollah Ali Khamenei would be removed from power — a bet that paid off when Khamenei was killed in a joint US-Israeli strike over the weekend. Israeli police have opened an investigation. This was not Magamyman’s first success: the account also correctly predicted the date of Israel’s October 2024 strike on Iran and subsequently changed its username, apparently to avoid scrutiny.
The information asymmetry problem
Prediction market advocates argue these platforms aggregate dispersed intelligence better than polls or pundits. That claim holds when participants are processing public information. It collapses when the edge comes from classified military planning. TMZ reported that a group at a Washington restaurant was openly discussing the imminent bombing of Iran on the Friday afternoon before strikes began. As journalist David Bernstein observed, that means any well-connected person within earshot could have placed a lucrative bet from their phone. The operational security failures of the current administration are not exactly a secret — but they have never before been directly monetisable at this scale.
The regulatory architecture is caught flat-footed. Polymarket’s main trading platform operates offshore, technically barred to US users since a $1.4 million CFTC fine in 2022 — though most American traders access it via VPN. The Trump administration dropped both the DOJ and CFTC investigations into the company after taking office. Donald Trump Jr. sits on Polymarket’s advisory board, and his venture capital firm 1789 Capital has invested tens of millions in the platform. The optics are, to put it mildly, suboptimal.
Kalshi’s awkward alternative
Polymarket’s domestically regulated rival, Kalshi, took a different path — and pleased nobody. When Khamenei’s death was confirmed, Kalshi voided bets on his removal from power, invoking a fine-print clause prohibiting markets that resolve on an individual’s death. Traders who had correctly called the outcome received partial refunds instead of payouts. The backlash was immediate and furious. US law prohibits contracts that create financial incentives for violence, assassination, or terrorism — a principle that Kalshi tried to honour and Polymarket simply ignored by operating outside US jurisdiction.
What it means
The Iran episode crystallises a problem that has been building since Polymarket’s election breakout. Prediction markets work precisely because they incentivise informed trading. But “informed” and “insider” are separated by a line that, in wartime, becomes vanishingly thin. Six Democratic senators have already written to the CFTC demanding a categorical ban on contracts tied to injury or death. Senator Murphy is drafting legislation. Representative Levin wants answers.
The deeper question is structural. If the US government cannot prevent its own officials from leaking strike timing over dinner, no amount of market regulation will close the profiteering gap. The prediction market is not the disease — it is the symptom of an administration that treats classified intelligence with the operational discipline of a group chat. Polymarket just made the cost of that carelessness visible, priced it in real time, and let anonymous accounts collect the spread.
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