It is wise for the FDIC, Fed and Treasury to make this joint announcement on the Sunday before banks/markets open on monday morning. The timing is crucial, because without such an announcement, there will likely be a run on all banks, not just SVB and Signature Bank liquidity problems. The liquidity problem would have a ripple effect to all banks. Why put money in banks, over $250k, if all the rest is going to disappear because of the ponzi scheme the bank is playing on the bank end. The banks don't have the money that the customers deposited, obviously.