From https://techcrunch.com/2023/03/09/silicon-valley-banks-share... : Becker said the bank has “ample liquidity” to support its clients “with one exception: If everybody is telling each other that SVB is in trouble, that will be a challenge.” Pro tip: if you're CEO of a bank that's facing a bank run, don't tell the press that you'll be in trouble if everybody takes their money out.
Perhaps I'm overly skeptical, but everyone should know that all banks have the risk of 'if everyone takes their money out, the bank won't be able to make it work', right?
SVB's customers are weighted significantly more towards businesses who will have more than $250k in the bank. So, they have to be ready to take action fast, so a bank run on SVB is much more likely.