DIAGON ALLEY, LONDON — The world-renowned Gringotts Bank has filed for bankruptcy and is closing its doors permanently, sources confirmed Thursday, after admitting that its business model of hoarding its customers' gold in a giant cavern guarded by a "friggin'…

Nearly half the money — $143 billion — went to holding companies for the two major banks that failed over the past week, Silicon Valley Bank and Signature Bank, triggering widespread alarm in financial markets.