Three Polymarket traders profited on US-Iran ceasefire bets

Three traders on the online prediction market Polymarket realized gains after buying and then selling ‘yes' contracts that tracked the likelihood of a US-Iran ceasefire in the days before a public announcement.

Trading records visible on the Polymarket platform show the purchases occurred when the market-implied probability was lower and sales took place as prices rose in response to diplomatic reports and official statements. Each trader sold positions before the market formally resolved.

Polymarket offers contracts that pay $1 if a specified event occurs and $0 if it does not. Contract prices reflect the market's aggregate estimate of an event's probability and can move quickly when new information or leaks reach participants.

The three traders followed different approaches. One built a position earlier when prices implied a lower chance of a ceasefire. A second added to a position as odds climbed. A third made shorter-term trades to capture momentum in the immediate lead-up to the announcement. Polymarket displays wallet addresses and trade histories but does not reveal personal identities, and no external confirmation of the traders’ identities was available.

Related: Iran strike bets spark insider trading questions

Market activity around the ceasefire prediction was concentrated in the hours and days before the announcement. Reported volume and price volatility rose as diplomatic developments emerged. Some traders who bought earlier and sold near the price peak recorded gains, while others who entered later or traded against the price movement recorded losses.

Prediction markets such as Polymarket have previously drawn regulatory attention over whether certain contracts qualify as tradable derivatives under securities and commodities laws. Platforms and firms have adjusted operations and disclosure practices in response to that scrutiny. Some platforms limit specific types of markets or increase monitoring of trading activity.

Polymarket's public trading records show the market's settlement timing and any platform or regulatory actions will be determined following the formal resolution process.