Robinhood CEO Vladimir Tenev says Robinhood Prediction Markets crossed 4B event contracts traded all-time, with over 2B in Q3 alone; HOOD closes up 12.27% (Bernard Goyder/Bloomberg)

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Bernard Goyder / Bloomberg:Robinhood CEO Vladimir Tenev says Robinhood Prediction Markets crossed 4B event contracts traded all-time, with over 2B in Q3 alone; HOOD closes up 12.27%  —  Robinhood Markets Inc. shares rose over 12% after Chief Executive Officer Vladimir Tenev said the online-stock brokerage …