Downtown San Francisco suffered another major blow this week when Westfield, the owner of the San Francisco Centre Mall, announced it would be returning the massive property to its lender. While the mall won't close immediately, it's a sign of serious trouble in the city's commercial core, where the owner of two major hotels also recently decided to surrender them. Host Cecilia Lei talks with reporters Roland Li and Carolyn Said to learn what might have prompted these owners to walk away and how the moves might open the door to new opportunities down the line.| Unlimited Chronicle access: sfchronicle.com/pod Got a tip, comment, question? Email us: fifth@sfchronicle.com Learn more about your ad choices. Visit megaphone.fm/adchoices