Prediction markets are quickly shifting from a niche sideline to an emerging asset class, with monthly volumes around $10 billion, said U.S. bank Citizens. Though tiny next to the more than $10 trillion in U.S. equities, they are growing fast as platforms like Robinhood (HOOD), Kalshi and Polymarket scale. The bank said these markets address a core flaw in traditional finance by letting investors trade directly on events like inflation figures, election results, Federal Reserve decisions and regulatory a ...