 Shares of Hertz Global Holdings Inc. HTZ, -0.79 fell 4.7 in premarket trading Thursday, after the car rental company beat earnings expectations but reported a big drop in margins as intentionally elevated maintenance costs addressed out-of-service levels. Net income rose to 577 million, or 1.33 a share, from 571 million, or 1.13 a share, in the year-ago period. 