> And it's a lot of money (e.g. 30% loss on $200bn is about $600 per US resident household).

I'm not sure where you got this number, but it's different than what I've seen. Yes, SVB had $200B in deposits, but it had $15B in unrealized losses. The FDIC is probably contributing $12B as roughly 6% of deposits were insured. That means the gap is probably $3B if the government is to step in, which is very different than the $60B you're suggesting. If these instruments can't be held to maturity then the losses may be greater as many of them are illiquid and would have to be sold at a discount, but the government has the liquidity to avoid that.