Robinhood Markets Inc. (NASDAQ:HOOD) has made significant strides in its 24-hour market trading initiative, with the trading volume nearing $30 billion, despite recent technical challenges. What Happened: The 24-hour market trading feature, which allows users to trade select stocks and ETFs outside of traditional market hours, has been well-received by Robinhood’s user base. CEO Vlad Tenev announced the approaching $30 billion trading volume during the second-quarter earnings call. “We are nearing $30 billion in volumes since launch in the overnight hours, and we are really excited because thi…