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. Buckle up: The day after the largest point-drop in the history of the Dow Jones Industrial Average, markets continued to swing wildly.  After falling nearly 1,200 points yesterday, the Dow opened Tuesday down 568 points before surging to a gain of more than 250 points and continuing to whipsaw from...