What Robinhood AnnouncedRobinhood Markets (NASDAQ: HOOD) said it will launch a new social media platform within its trading app, dubbed Robinhood Social, to let users post trades, discuss strategies, and track performance of peers, hedge funds, politicians, and insiders. The service will roll out to a limited number of U.S. customers early next year before broader availability.Alongside the social feature, Robinhood unveiled a new AI-powered chart-building tool, support for short selling (coming in the mont ...