Summary: Here's everything you need to know before Tuesday's opening bell 1. Shares of LongFin were slightly down premarket after jumping 229% on Monday 2. Cars.com jumped after hours after disclosing that Starboard bought a stake in the online auto marketplace 3. Earnings are expected from Carnival, Darden, Micron and more 4. U.S. futures pointed toward more records ahead of an anticipated tax reform vote Watch More with TheStreet: These Stock Sectors Will Benefit the Most From Tax Reform Activision Blizzard Is a Revolution, Says Jim Cramer Make Your Kid a Millionaire, The Perfect Holiday Gift Jim Cramer Maintains That Apple Is to Be Owned, Not Traded
