Motley FoolWhy Tesla, Inc. Stock Fell TuesdayMotley FoolShares of electric-car company Tesla (NASDAQ:TSLA) took a hit Tuesday, falling as much as 6.6%. As of 1:45 p.m. EDT, shares were down about 4%. The stock's slide follows news that the Department of Justice is investigating Tesla CEO Elon Musk's Aug.and more »