Man charged with fraud after using hairdryer to rig weather prediction market

A man exploited a Polymarket weather prediction market using a hairdryer, Jinse Finance reported. He artificially raised the temperature reading of a French meteorological service sensor outside Paris Charles de Gaulle (CDG) airport by pointing a hairdryer at it. This allowed him to manipulate the outcome of Polymarket's "Paris daily high temperature" market, which relied solely on data from that single sensor. He earned a total of $34,000 (approx. 50 million won) across two separate instances. After detecting an abnormal data spike, the French meteorological service launched an investigation and has since sued the man for obstruction of business and fraud.