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An anonymous reader shares a report: The volume of activity on Polymarket, one of the most popular prediction markets, has been significantly inflated by so-called wash trading in which users rapidly buy and sell the same contracts, according to a new study by Columbia University researchers. The "artificial trading," as the authors call it, varied over time but accounted for an average of 25% of all buying and selling on Polymarket over the past three years, the researchers concluded. The paper, which has not undergone peer review, was posted Thursday on the open-access research platform SSRN. The authors do not suggest that Polymarket itself was responsible for the wash trading, but they point to elements of the exchange's crypto-based structure that make it possible.

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Rockstar Games has announced that Grand Theft Auto VI won't launch in May of next year as planned. Kotaku: The highly anticipated sequel is now set to arrive in November 2026. On Thursday, Rockstar announced on social media that the long-awaited next entry in its open-world blockbuster franchise would need a bit more time, delaying the game an additional six months from May to November 19, 2026. Rockstar said "these extra months will allow us to finish the game with the level of polish you have come to expect and deserve."

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