What you need to know on Wall Street today

Welcome to Finance Insider, Business Insider's summary of the top stories of the past 24 hours. Sign up here to get the best of Business Insider delivered direct to your inbox. Stocks are once again getting creamed as a volatile week rages on. The markets rallied on Wednesday, with the Dow closing up 567 points, or 2.3%. But by Thursday, the index of large companies including Boeing and Apple returned to the red for 2018. The chief strategist at a $695 billion money manager tells us...