How Big Will the Contagion Spread?

There are 5,000 odd banks in the US. This is apparently by some measure, the 18th largest bank. If this could happen to Silicon Valley Bank and they weren't doing maybe they're a bit sloppy, maybe they should have done better,. Then the follow up question is which other institutions are vulnerable and how big the contagion get? Right. So there's currently, this is the FDIC just testified a week ago that we have 620 billion of unrealized losses in banks. I don't know which banks have those losses. Do you? How are we supposed to figure that out? I mean, like even Bill Ackman, who's a very sophisticated investor says he can