 Shares of Avis Budget Group Inc. CAR, -2.83 rallied more than 6 in the extended session Monday after the car-rental company reported third-quarter earnings well above Wall Street expectations and said it expects the strong summer demand to carry through the end of the year. Avis earned 1.03 billion, or 21.67 a share, in the quarter, compared with 674 million, or 10.45 a share, in the year-ago period. 