France’s weather forecasting service has filed a police complaint after detecting anomalies in its temperature gauges at Paris-Charles de Gaulle airport, which coincided with a surge in well-timed bets on prediction market Polymarket.
Météo-France filed the complaint alleging interference with its equipment after temperatures measured at the airport spiked by several degrees Celsius in the space of a few minutes on April 6 and 15. The humidity also dropped sharply at the same time on April 15.
Users of weather forums who noticed the sudden movements said they may have been caused by people tampering with the equipment to shape the outcome of wagers on Polymarket. Multiple accounts on the platform, where traders can bet on real-world outcomes, appeared to have placed large bets on unexpected temperature rises in Paris.