How much longer will America’s regional banks hold up?

What kind of story is unfolding in the banking system? At first glance it would appear to be a tragic drama. In the past fortnight, four banks have met their end: two crypto lenders, the dominant bank in Silicon Valley and most recently a global systemically important bank. There have been 11th-hour interventions to protect customers, the creation of emergency-lending facilities and a marriage between two giant rival firms.