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. President Donald Trump on Thursday attacked Amazon on Twitter, one day after a report said he was "obsessed" with going after it. Trump tweeted about the company the day after the news website Axios reported that the president was considering action over the way the online giant is taxed and uses the US Postal...