(Bloomberg) — Robinhood Markets Inc. shares rose over 12% after Chief Executive Officer Vladimir Tenev said the online-stock brokerage has made strong inroads into prediction markets, where people wager on elections, sporting matches and other widely followed events. The executive said in a post on X on Monday that Robinhood customers have now transacted more than 4 billion of such event contracts, 2 billion of which were in the third quarter alone. Most Read from Bloomberg Betting on prediction market ...