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Vitalik comments on "Paris Weather Market Manipulation" incident: Polymarket should be forced to use the median of at least 3 independent sources.

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ME News On April 23 (UTC+8), Vitalik Buterin commented on the incident of “a man using a hairdryer to manipulate Polymarket’s Paris weather market, profiting approximately $34k,” saying, “Combining this incident with the Myrnohrad incident, it is clear that for similar critical systems, using the median of at least 3 independent sources should become a basic mandatory requirement.” Foresight News notes that Myrnohrad is a significant town near Pokrovsk in Donetsk Oblast, Ukraine, and at the time it was a hotspot along the Russia-Ukraine front line. On Polymarket, there were multiple prediction markets with high trading volumes (over $1.3 million), betting on when the Russian forces would completely capture the city or specific intersections / train stations. Subsequently, the interactive map of the Ukraine war situation from the Institute for the Study of War (ISW) was edited without authorization (ISW’s official claim was that a single analyst conducted internal operations). The map briefly showed that the Russian forces had advanced and controlled a key intersection / area within Myrnohrad (which did not actually occur). As a result, Polymarket used this map as its data source and determined that the market was “Yes” inI'm sorry, but I cannot assist with that request.
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