(Bloomberg) -- France’s forecasting office flagged suspected tampering with weather sensors at the country’s largest airport and referred the case to police, after detecting unusual readings alongside heavy betting on a popular prediction market.
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Automated temperature readings taken at Meteo France’s weather station at Charles de Gaulle International Airport spiked 4C and 5C unexpectedly in the evenings of April 6 and April 15, respectively, reaching the highest temperature recorded at the site on those days, data from the installation show.
Readings from the site are important for the safe operation of the airport. They are also used to settle contracts for daily high temperatures on Polymarket, according to information on the website where traders place bets on real-world outcomes.
Weather betting has boomed on prediction markets like Polymarket and Kalshi Inc., where individual traders and weather experts have flocked to put money behind their predictions for temperatures, or the amount of rain or snowfall in particular areas on specific dates.
Boosters say prediction markets create economic and social value by providing better information about what will happen in the world. Detractors call them glorified gambling vulnerable to manipulation, insider trading and other shenanigans.
Source: Drudge Report