$381.6 million, or $20.39 billion. AutoNation shares have increased 12% since the beginning of the year, while the Standard & Poor's 500 index has risen almost 5%. The stock has climbed 64% in the last 12 months. This story was generated by Automated Insights (http://automatedinsights.com/ap) using data from Zacks Investment Research. Access a Copyright by Automated Insights, Inc. All rights reserved., source Associated Press News 03/12