Polymarket recorded a record single-day nominal trading volume of $478 million on the day of the joint U.S.–Israel strike on Iran, with politics markets accounting for $220 million (46.2%). On-chain analysts identified six newly funded wallets that together gained about $1.2 million by buying “yes” on a contract predicting a U.S. strike hours before it occurred. The activity — coinciding with a high-profile bettor losing $6.5 million that day — has drawn scrutiny from analysts and regulators and highlights rapid growth in blockchain prediction markets during geopolitical crises.

Facts: record $478M single-day volume and $220M in politics markets; six newly funded wallets profited ~$1.2M by buying “yes” hours before the strike; the episode has drawn analyst and regulator scrutiny. These facts justify a negative sentiment (insider-trading and regulatory attention) and a moderate market impact (large volume and concrete on-chain profit signals could influence short-term trading and regulatory responses).