Almost a century after the Wall Street crash of 1929, Andrew Ross Sorkin says he believes some of its most dangerous ingredients are reappearing. Joining Stephanie Flanders on Trumponomics, the financial journalist and author of 1929: Inside the Greatest Crash in Wall Street History argues that today’s market is filled with “eerie parallels” to the late 1920s. These include a transformative new technology, a flood of retail investors and a growing willingness to loosen the rules.