Photographer: Angus Mordant/Bloomberg Carvana Co.’s shares fell the most in more than nine months after a short seller alleged the online auto retailer overstated earnings with the help of close ties to businesses controlled by the family of Chief Executive Officer Ernie Garcia III. The report by Gotham City Research alleged that Carvana has not fully disclosed all the benefits it receives from DriveTime, a privately held used-car retailer and subprime lender owned and controlled by Ernie Garcia II, the ...