Michael O Hara

Amazon.com, the world’s largest online merchant, won the top spot in an annual survey of the healthiest U.S. and Canadian retailers for a second year in a row as more shoppers make purchases online. Amazon’s technology keeps inventory levels and expenses down, said Consensus Advisors Chief Executive Officer Michael O’Hara, whose firm did the survey. Aeropostale, Urban Outfitters, CVS Caremark Corp. and Wal-Mart Stores round out the top five in the list, released this week.