{video} Stock-trading start-up Robinhood is facing legal fallout from its recent outage. A Robinhood client based in Sarasota Florida, filed a federal lawsuit on behalf of himself and other traders Wednesday evening. Travis Taaffe alleges that Robinhood was negligent and breached its contract by failing to “provide a functioning platform,” leaving traders unable to move money while stock markets surged. The start-up’s two-day outage began on Monday. Robinhood’s trading platform remained offline until Tuesday afternoon. In the meantime, the Dow saw its single-biggest point gain in history and the Federal Reserve ... (full story)