MLB Designates Polymarket as Exclusive Prediction Market Trading Partner

Polymarket User Profits $34K by Manipulating Paris Airport Weather Sensor

A user made about $34,000 on Polymarket by tampering with a Paris CDG temperature sensor to inflate readings, affecting weather contracts settled with Météo France; two manipulation events on April 6 and 15; charges filed. A trader earned roughly $34,000 on Polymarket by artificially boosting a sensor near Paris Charles de Gaulle Airport to spike a day's high temperature, exploiting mispriced weather options. Polymarket's weather settlements relied on Météo France data; the incidents occurred on April 6 and April 15, and Météo France has pressed market-manipulation charges.

Kalshi trading volume surpasses Polymarket as two major prediction markets move into sustainability futures

According to a Bloomberg report dated April 23, Polymarket—long a dominant force in predicting-market trading volume—has been facing multiple operational challenges. Dune Analytics data shows that Polymarket’s global trading volume has been surpassed by Kalshi; on valuation, after Kalshi announced a new round of funding last month, it reached $22 billion. The two prediction markets simultaneously announced plans to enter the perpetual futures market in April.

A Frenchman “manipulated” Paris weather sensors, earning $34,000 in Polymarket profits

According to disclosures by the crypto community account @aaronjmars on April 23 on the X platform, and subsequent reporting by Le Monde and BFMTV, a man allegedly tampered with the automated weather sensors at Paris Charles de Gaulle Airport (CDG) with portable heating devices on April 6 and April 15, respectively, generating cumulative profits of about $34k from weather betting markets on the prediction market platform Polymarket.

New York Governor Hochul signs an executive order restricting state government employees from “insider trading in prediction markets”

New York Governor Kathy Hochul signed an executive order on Wednesday, April 22, barring state officials and employees from using nonpublic information obtained through their positions to place bets in prediction markets, or from assisting any third party in engaging in the foregoing conduct. On the same day, prediction market platform Kalshi announced that it had completed an internal investigation into three political candidates who placed bets in their own campaign activities, and imposed fines and suspensions on them.

Jupiter Launches Prediction Market Telegram Bot with New Clans Feature

Jupiter launches Prediction Bot on Telegram with Clans, enabling team-based discussion and social competition for collaborative trading in the Telegram ecosystem.

Kalshi: Three candidates illegally bet on their own campaigns, fined and barred for five years

According to a report by The New York Times on April 23, Kalshi, a prediction market platform, issued disciplinary actions to three political candidates who attempted to bet on their own election campaigns, and the relevant disciplinary action letters have been posted on Kalshi’s website. Bobby Deno, head of enforcement and legal counsel at Kalshi, said the sanctions are part of the platform’s “proactive engineering solution,” designed to identify trading activity that violates the platform’s recently updated rules.