Julia’s special guest today is venture capitalist Bradley Tusk. He argues that Silcon Valley Bank’s sudden collapse shows that financial regulators are unprepared for bank runs in the age of social media and says major platforms such as Twitter and Instagram should be required to flag major spikes in activity concerning financial institutions to allow regulators to get ahead of possible problems faster. Also on today’s show: Kristina Hooper, chief global market strategist at Invesco. To learn more about how CNN protects listener privacy, visit cnn.com/privacy