Some 186 financial institutions in the United States are vulnerable to a collapse if uninsured depositors seek to withdraw their funds, according to a study from analysts with the National Bureau of Economic Research. The research comes shortly after the collapse of Silicon Valley Bank, where the vast majority of accounts exceeded the $250,000 threshold guaranteed by the Federal Deposit Insurance Corporation (FDIC). Financial authorities scrambled to back all deposits at Silicon Valley Bank such that the remainder of the financial system, in which roughly half of deposits surpass $250,000, would remain safeguarded against bank runs. Silicon Valley Bank had...