U.S. stocks ended 2018 skimming bear market territory. In the new year, the market has bounced back somewhat but remains volatile. This week, Wharton finance professor Jeremy Siegel joined the Knowledge@Wharton show on SiriusXM to discuss the market outlook, Fed rate hikes and the impact of the U.S.-China trade war. He is also co-host of the show “Behind the Markets” on Wharton Business Radio every Friday. Siegel was joined by Gad Allon, who is director of the Jerome Fisher Program in Management and Technology at Wharton and also professor of operations, information and decisions.