Bloomberg Opinion columnist Barry Ritholtz speaks with public-health expert Dr. Charity Dean, who as a health official in California was among the first Americans to recognize the grave threat posed by Covid-19. Her story is recounted in Michael Lewis's latest book, "The Premonition: A Pandemic Story." She is the co-founder of The Public Health Company, which she also leads as chief executive officer. See omnystudio.com/listener for privacy information.

Bloomberg Opinion columnist Barry Ritholtz speaks with Mat Ishbia, the chief executive officer of United Wholesale Mortgage, which is the top wholesale lender and No. 2 overall mortgage lender in the United States. The 9,000-person firm went public in the biggest SPAC ever. Ishbia is also the author of “Running the Corporate Offense: Lessons in Effective Leadership from the Bench to the Board Room.” See omnystudio.com/listener for privacy information.