S&P 500 Gains and Losses Today: Walgreens Stock Plummets as DOJ Files Lawsuit

Key TakeawaysThe S&P 500 added 0.9% on Tuesday, Jan. 21, the first day of trading following President Donald Trump's return to the White House.Oracle stock surged following reports that the software giant would participate in a massive joint venture to build out AI infrastructure in the U.S.Walgreens shares plunged as the Justice Department filed a lawsuit claiming the pharmacy chain had dispensed prescriptions with no legitimate medical basis. Major U.S. equities indexes advanced as the markets kicked off ...