Earlier quoted context omitted.
The maturity value of a bond/mbs is not really the true value at a given time between it being issued and maturing. You can treat it that way as a person holding the bond if you pinky-promise to yourself to not sell until maturity, but since banks need to periodically sell these to let customers get their deposits, that fiction doesn’t work for them. These things trade on the open market and adjust to interest rate c…
The regulation to my knowledge does require marking to maturity. Yes as I have commented elsewhere in this post, all banks do this. SVB had the unique situation of being the canary in the mine, as they had to get a lot of MBS during low interest rates of 2021/2020. Your question is the jackpot one, yes: how many other banks are following closely by. If the Fed continues or increases the rate hike I would be surprised…
If the present value of a bank’s assets are lower than the present value of deposits, that is insolvency: calling it illiquidity just because the bank doesn’t want to sell its actually-liquid underwater assets right now is a cop-out.