In this articleJPMPeople line up outside of the shuttered Silicon Valley Bank (SVB) headquarters on March 10, 2023 in Santa Clara, California.Justin Sullivan | Getty ImagesThree years ago, JPMorgan Chase executive Doug Petno was at a New York City party celebrating a colleague's retirement when his boss, Jamie Dimon, called Petno over.It was March 9, 2023, and the customers of a West Coast lender known for catering to startups had been withdrawing deposits in droves."Jamie looks at me and says, 'Get on this ...