Kerrigan index: How healthy are the publics
What it is: An index that tracks the stock price and market capitalization of each of the seven major public dealership groups: AutoNation Inc., Asbury Automotive Group Inc., Group 1 Automotive Inc., Lithia Motors Inc., Penske Automotive Group Inc. and Sonic Automotive Inc., plus CarMax Inc., the nation’s largest used-vehicle retailer. The Kerrigan Index is