CarMax, Inc. (NYSE: KMX) today announced that its Board of Directors has approved a $2 billion expansion of the company’s share repurchase program, for an aggregate share repurchase authorization of $3.8 billion since the initial announcement of the program in October 2012. As of August 31, 2014, the company had made $893 million of repurchases under the program. The expanded authorization is effective immediately and expires on December 31, 2016. Source: Press Release