Polymarket Traders Earn $37K After Paris Weather Glitch Raises Manipulation Concerns

Two accounts on Polymarket have drawn scrutiny after earning roughly $37,000 by correctly betting on unusual temperature readings recorded at a Paris weather station located at Charles de Gaulle Airport.

The wagers centered on prediction markets tracking the highest temperature in Paris on April 6 and April 15, using official readings from the airport station measured in degrees Celsius. French broadcaster BFMTV reported that temperatures unexpectedly rose above 21°C on April 6 before quickly dropping back to prior levels. That market concluded with winnings exceeding $16,000.

Analysts Highlight Unusual Trading Patterns

Blockchain analytics firm Bubblemaps identified a similar anomaly on April 15, when the temperature held near 18°C for most of the day before abruptly jumping to 22°C and then falling again. Analysts noted that shortly before the spike, one trader purchased NO shares on “18°C”, later exiting the position with profits exceeding $21,000.

Meteorologist and Authorities Investigate Possible Tampering

Meteorologist Ruben Hallali stated that such rapid temperature swings were unlikely to occur naturally and suggested the possibility of physical interference with the sensors.

France’s national weather agency, Meteo France, has filed a complaint with the Roissy Air Transport Gendarmerie Brigade, alleging potential tampering with automated data systems. The case adds to growing regulatory scrutiny surrounding prediction markets and possible manipulation risks.

Disclaimer

This content is for informational purposes only and does not constitute financial, investment, or legal advice. Cryptocurrency trading involves risk and may result in financial loss.