Delta flies higher on earnings. Wells Fargo slips on higher legal costs. Domino's drops despite strong sales. And MercadoLibre sells off on concerns over Amazon. Plus, at the 20:23 mark, NYU business professor Scott Galloway talks about his new book, The Four: The Hidden DNA of Amazon, Apple, Facebook, and Google. Thanks to Slack for supporting The Motley Fool. Slack: Where work happens. Find out why at slack.com.